diff --git a/.gitignore b/.gitignore
index 7d797cc..0d5bf7f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 /vendor/
-/data/
+data/cache
+data/upload
 /ts.db
 /config.*.ini
 /www/
diff --git a/README.md b/README.md
index ef634ed..1181c40 100644
--- a/README.md
+++ b/README.md
@@ -6,34 +6,3 @@ We make releasing music easier.
 We are DIY artists, label people, software developers and music consumers who are building tools to give indies superpowers in the age of big data.
 
 "Giving indies superpowers in the age of big data."
-
-Dev todo
---------
-
-Notes for Wednesday: the database speedup is immense. From 6 minutes to about 15 seconds.
-But there's still more to do, and ideally it should all be done within 1 second.
-So, here's how:
-
-- [x] When the file is uploaded, just store it in the Upload table.
-- [x] Introduce a new field, Upload.processedUsages
-- [x] In a background script, loop over all uploads that are not processed and extract their usages (then mark as processed)
-- [ ] Introduce another new field, Usage.processed
-- [ ] In another background script, loop over all usages that are unprocessed, finishing the job here.
-- [ ] The usage processor needs to match products and artists - rather than doing this individually in a loop, lookup the unique artist/product first, to cache the IDs (or create new ones), then it's possible to insert UsageOfProduct rows on bulk!
-- [ ] Then optimise further with a profiler. Ideally, a very large import should be completed before the page has chance to reload.
-- [ ] If a spinner is necessary, it should be put onto the three-checkbox page. It's also possible to know how many usages are left to process, so an ACTUAL progress bar is possible.
-
-Setup guide
------------
-
-TODO: From scratch for Linux, Windows and Mac.
-
-Running locally
----------------
-
-TODO.
-
-Writing/running tests
----------------------
-
-TODO.
diff --git a/asset/.DS_Store b/asset/.DS_Store
index 41d07b4..6d638cd 100644
Binary files a/asset/.DS_Store and b/asset/.DS_Store differ
diff --git a/behat.yml b/behat.yml
index 17717b5..3479a82 100644
--- a/behat.yml
+++ b/behat.yml
@@ -14,7 +14,8 @@ default:
         - \SHIFT\Trackshift\BehatContext\AuthContext:
         - \SHIFT\Trackshift\BehatContext\PageContext:
         - \SHIFT\Trackshift\BehatContext\UploadContext:
-        - \SHIFT\Trackshift\BehatContext\AnotherContext:
+        - \SHIFT\Trackshift\BehatContext\NotificationContext:
+        - \SHIFT\Trackshift\BehatContext\DebugContext:
 
   extensions:
     Behat\MinkExtension:
diff --git a/class/Audit/AuditItem.php b/class/Audit/AuditItem.php
index 5b99956..f739b89 100644
--- a/class/Audit/AuditItem.php
+++ b/class/Audit/AuditItem.php
@@ -31,7 +31,8 @@ public function getHtml():string {
 			"create" => "Created new $typeName ($descriptionOrId)",
 			"update" => "Updated $typeName ($descriptionOrId)",
 			"delete" => "Deleted $typeName ($descriptionOrId)",
-			default => "Something happened...",
+			"notification" => $descriptionOrId,
+			default => "Unhandled audit type ($this->type)",
 		};
 	}
 
diff --git a/class/Audit/AuditRepository.php b/class/Audit/AuditRepository.php
index d9fecdc..5723d42 100644
--- a/class/Audit/AuditRepository.php
+++ b/class/Audit/AuditRepository.php
@@ -1,12 +1,22 @@
 <?php
 namespace SHIFT\Trackshift\Audit;
 
+use DateTime;
+use Gt\Database\Query\QueryCollection;
 use Gt\Database\Result\Row;
 use Gt\Ulid\Ulid;
 use SHIFT\Trackshift\Auth\User;
+use SHIFT\Trackshift\Auth\UserRepository;
 use SHIFT\Trackshift\Repository\Repository;
 
 readonly class AuditRepository extends Repository {
+	public function __construct(
+		QueryCollection $db,
+		private UserRepository $userRepository,
+	) {
+		parent::__construct($db);
+	}
+
 	public function create(User $user, string $newId, ?string $description = null):void {
 		$this->db->insert("insertCreation", [
 			"id" => new Ulid("audit"),
@@ -16,6 +26,16 @@ public function create(User $user, string $newId, ?string $description = null):v
 		]);
 	}
 
+	public function notify(User $user, string $description, ?string $idInQuestion = null):void {
+		$this->db->insert("insertNotification", [
+			"id" => new Ulid("audit"),
+			"userId" => $user->id,
+			"description" => $description,
+			"valueId" => $idInQuestion,
+		]);
+	}
+
+
 	public function delete(User $user, string $deletedId, ?string $description = null):void {
 		$this->db->insert("insertDeletion", [
 			"id" => new Ulid("audit"),
@@ -39,11 +59,25 @@ public function getAll(User $user):array {
 		return $auditItemArray;
 	}
 
+	public function getLatest(User $user, bool $notificationOnly = false):null|AuditItem|NotificationItem {
+		if($notificationOnly) {
+			$row = $this->db->fetch("getLatestNotification", $user->id);
+		}
+		else {
+			$row = $this->db->fetch("getLatest", $user->id);
+		}
+		return $this->rowToAuditItem($row, $user);
+	}
+
 	private function rowToAuditItem(?Row $row, ?User $user = null):?AuditItem {
 		if(!$row) {
 			return null;
 		}
 
+		if(!$user) {
+			$user = $this->userRepository->getById($row->getString("userId"));
+		}
+
 		return new AuditItem(
 			$row->getString("id"),
 			$user,
@@ -85,6 +119,22 @@ public function update(
 		}
 	}
 
+	public function checkNotifications(User $user):void {
+		$this->userRepository->setNotificationCheckTime($user);
+	}
+
+	public function isNewNotification(User $user):bool {
+		$timeLatestNotification = null;
+		$timeLastChecked = $this->userRepository->getLatestNotificationCheckTime($user);
+
+		if($latestNotification = $this->getLatest($user, true)) {
+			$timeLatestNotification = new DateTime();
+			$timeLatestNotification->setTimestamp((new Ulid(init: $latestNotification->id))->getTimestamp() / 1000);
+		}
+
+		return $timeLatestNotification && $timeLatestNotification > $timeLastChecked;
+	}
+
 	/** @return array<string, string> key = property name, value = "$oldValue -> $newValue" */
 	private function getDiff(object $from, object $to):array {
 		$fromVars = get_object_vars($from);
@@ -102,4 +152,5 @@ private function getDiff(object $from, object $to):array {
 	}
 
 
+
 }
diff --git a/class/Auth/UserRepository.php b/class/Auth/UserRepository.php
index 01ecb84..95be832 100644
--- a/class/Auth/UserRepository.php
+++ b/class/Auth/UserRepository.php
@@ -1,7 +1,10 @@
 <?php
 namespace SHIFT\Trackshift\Auth;
 
+use DateTime;
+use DateTimeInterface;
 use Gt\Database\Query\QueryCollection;
+use Gt\Database\Result\Row;
 use Gt\Session\SessionStore;
 use Gt\Ulid\Ulid;
 use SHIFT\Trackshift\Repository\Repository;
@@ -21,6 +24,11 @@ public function getLoggedInUser():?User {
 		return $this->session->getInstance(self::SESSION_USER, User::class);
 	}
 
+	public function getById(string $id):?User {
+		$row = $this->db->fetch("getById", $id);
+		return $this->rowToUser($row);
+	}
+
 	public function createNewUser():User {
 		$user = new User(new Ulid("user"));
 		$this->db->insert("create", $user->id);
@@ -30,4 +38,30 @@ public function createNewUser():User {
 	public function persistUser(User $user):void {
 		$this->session->set(self::SESSION_USER, $user);
 	}
+
+	public function setNotificationCheckTime(User $user, DateTime $when = null):void {
+		if(is_null($when)) {
+			$when = new DateTime();
+		}
+
+		$this->db->update("setNotificationCheckedAt", [
+			"userId" => $user->id,
+			"checkedAt" => $when->getTimestamp(),
+		]);
+	}
+
+	public function getLatestNotificationCheckTime(User $user):?DateTimeInterface {
+		return $this->db->fetchDateTime("getLastNotificationCheckTime", $user->id);
+	}
+
+	private function rowToUser(?Row $row):?User {
+		if(!$row) {
+			return null;
+		}
+
+		return new User($row->getString("id"));
+	}
+
+
+
 }
diff --git a/class/Cost/CostRepository.php b/class/Cost/CostRepository.php
index 302d853..4aacdd3 100644
--- a/class/Cost/CostRepository.php
+++ b/class/Cost/CostRepository.php
@@ -28,6 +28,7 @@ public function create(Cost $cost, User $user):void {
 		$this->db->insert("create", [
 			"id" => $cost->id,
 			"productId" => $cost->product->id,
+			"userId" => $user->id,
 			"description" => $cost->description,
 			"amount" => $cost->amount->value,
 		]);
diff --git a/class/ServiceLoader.php b/class/ServiceLoader.php
index e85822b..58fb726 100644
--- a/class/ServiceLoader.php
+++ b/class/ServiceLoader.php
@@ -12,6 +12,7 @@
 use SHIFT\Trackshift\Content\ContentRepository;
 use SHIFT\Trackshift\Cost\CostRepository;
 use SHIFT\Trackshift\Product\ProductRepository;
+use SHIFT\Trackshift\Split\SplitRepository;
 use SHIFT\Trackshift\Upload\UploadManager;
 
 class ServiceLoader extends DefaultServiceLoader {
@@ -19,6 +20,7 @@ public function loadAuditRepo():AuditRepository {
 		$database = $this->container->get(Database::class);
 		return new AuditRepository(
 			$database->queryCollection("Audit"),
+			$this->container->get(UserRepository::class),
 		);
 	}
 
@@ -89,4 +91,11 @@ public function loadCostRepository():CostRepository {
 			$this->container->get(AuditRepository::class),
 		);
 	}
+
+	public function loadSplitRepository():SplitRepository {
+		$database = $this->container->get(Database::class);
+		return new SplitRepository(
+			$database->queryCollection("Split"),
+		);
+	}
 }
diff --git a/class/Split/EmptySplitPercentage.php b/class/Split/EmptySplitPercentage.php
new file mode 100644
index 0000000..6349287
--- /dev/null
+++ b/class/Split/EmptySplitPercentage.php
@@ -0,0 +1,9 @@
+<?php
+namespace SHIFT\Trackshift\Split;
+
+use SHIFT\Trackshift\Split\SplitPercentage;
+
+readonly class EmptySplitPercentage extends SplitPercentage {
+	/** @noinspection PhpMissingParentConstructorInspection */
+	public function __construct() {}
+}
diff --git a/class/Split/RemainderSplitPercentage.php b/class/Split/RemainderSplitPercentage.php
new file mode 100644
index 0000000..375c70d
--- /dev/null
+++ b/class/Split/RemainderSplitPercentage.php
@@ -0,0 +1,10 @@
+<?php
+namespace SHIFT\Trackshift\Split;
+
+use SHIFT\Trackshift\Split\EmptySplitPercentage;
+
+readonly class RemainderSplitPercentage extends EmptySplitPercentage {
+	public function __construct() {
+
+	}
+}
diff --git a/class/Split/Split.php b/class/Split/Split.php
new file mode 100644
index 0000000..8424c5b
--- /dev/null
+++ b/class/Split/Split.php
@@ -0,0 +1,14 @@
+<?php
+namespace SHIFT\Trackshift\Split;
+
+use SHIFT\Trackshift\Auth\User;
+use SHIFT\Trackshift\Product\Product;
+use SHIFT\Trackshift\Repository\Entity;
+
+readonly class Split extends Entity {
+	public function __construct(
+		public string $id,
+		public User $user,
+		public Product $product,
+	) {}
+}
diff --git a/class/Split/SplitPercentage.php b/class/Split/SplitPercentage.php
new file mode 100644
index 0000000..c5a00d4
--- /dev/null
+++ b/class/Split/SplitPercentage.php
@@ -0,0 +1,14 @@
+<?php
+namespace SHIFT\Trackshift\Split;
+
+use SHIFT\Trackshift\Repository\Entity;
+
+readonly class SplitPercentage extends Entity {
+	public function __construct(
+		public string $id,
+		public Split $split,
+		public string $owner,
+		public float $percentage,
+		public string $email,
+	) {}
+}
diff --git a/class/Split/SplitRepository.php b/class/Split/SplitRepository.php
new file mode 100644
index 0000000..6f3dd4f
--- /dev/null
+++ b/class/Split/SplitRepository.php
@@ -0,0 +1,13 @@
+<?php
+namespace SHIFT\Trackshift\Split;
+
+use SHIFT\Trackshift\Auth\User;
+use SHIFT\Trackshift\Repository\Repository;
+
+readonly class SplitRepository extends Repository {
+	/** @return array<SplitPercentage> */
+	public function getPercentageList(User $user, string $productId):array {
+		return [];
+	}
+
+}
diff --git a/class/Upload/UnknownUpload.php b/class/Upload/UnknownUpload.php
index f921b3e..0b237cf 100644
--- a/class/Upload/UnknownUpload.php
+++ b/class/Upload/UnknownUpload.php
@@ -8,12 +8,12 @@ protected function processUsages():void {}
 
 	// phpcs:ignore
 	public function extractArtistName(array $row):string {
-		return "";
+		return "Unknown";
 	}
 
 	// phpcs:ignore
 	public function extractProductTitle(array $row):string {
-		return "";
+		return "Unknown";
 	}
 
 	// phpcs:ignore
diff --git a/class/Upload/UploadManager.php b/class/Upload/UploadManager.php
index b11af09..e33d8b5 100644
--- a/class/Upload/UploadManager.php
+++ b/class/Upload/UploadManager.php
@@ -22,9 +22,7 @@
 use SHIFT\Trackshift\Usage\Usage;
 use SplFileObject;
 
-/**
- * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
- */
+/** @SuppressWarnings(PHPMD.CouplingBetweenObjects) */
 readonly class UploadManager extends Repository {
 	public function __construct(
 		QueryCollection $db,
@@ -67,7 +65,13 @@ public function upload(User $user, FileUpload...$uploadList):array {
 				"type" => $upload::class,
 			]);
 
-			$this->auditRepository->create($user, $upload->id, $upload->filename);
+			if($upload instanceof UnknownUpload) {
+				$this->auditRepository->notify($user, "Your latest upload was not processed ($upload->filename)", $upload->id);
+			}
+			else {
+				$this->auditRepository->create($user, $upload->id, $upload->filename);
+			}
+
 			array_push($completedUploadList, $upload);
 		}
 
@@ -405,6 +409,4 @@ private function rowToProduct(?Row $row, ?Artist $artist):?Product {
 			$artist // ?? $this->getArtistById($row->getString("artistId")
 		);
 	}
-
-
 }
diff --git a/composer.json b/composer.json
index 4f341e0..43e1cdf 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
 		"php": ">=8.2",
 		"superhyperinstantfuturetime/spotify-api": "dev-master",
 		"phpgt/webengine": "dev-master",
-		"phpgt/database": "dev-dynamic-sets as v1.5.0",
+		"phpgt/database": "dev-318-semicolon as v1.4.0",
 		"league/commonmark": "^2.4"
 	},
 	"require-dev": {
diff --git a/composer.lock b/composer.lock
index 27040bd..c9871e1 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "fb4cd5a2e3aaed7361c37b8f1d257cfb",
+    "content-hash": "0ca323d77187aab6d407099eaa037543",
     "packages": [
         {
             "name": "composer/semver",
@@ -226,6 +226,66 @@
             ],
             "time": "2020-10-13T00:52:37+00:00"
         },
+        {
+            "name": "greenlion/php-sql-parser",
+            "version": "v4.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/greenlion/PHP-SQL-Parser.git",
+                "reference": "f0e4645eb1612f0a295e3d35bda4c7740ae8c366"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/greenlion/PHP-SQL-Parser/zipball/f0e4645eb1612f0a295e3d35bda4c7740ae8c366",
+                "reference": "f0e4645eb1612f0a295e3d35bda4c7740ae8c366",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.2"
+            },
+            "require-dev": {
+                "analog/analog": "^1.0.6",
+                "phpunit/phpunit": "^9.5.13",
+                "squizlabs/php_codesniffer": "^1.5.1"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "PHPSQLParser\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Justin Swanhart",
+                    "email": "greenlion@gmail.com",
+                    "homepage": "http://code.google.com/u/greenlion@gmail.com/",
+                    "role": "Owner"
+                },
+                {
+                    "name": "André Rothe",
+                    "email": "phosco@gmx.de",
+                    "homepage": "https://www.phosco.info",
+                    "role": "Committer"
+                }
+            ],
+            "description": "A pure PHP SQL (non validating) parser w/ focus on MySQL dialect of SQL",
+            "homepage": "https://github.com/greenlion/PHP-SQL-Parser",
+            "keywords": [
+                "creator",
+                "mysql",
+                "parser",
+                "sql"
+            ],
+            "support": {
+                "issues": "https://github.com/greenlion/PHP-SQL-Parser/issues",
+                "source": "https://github.com/greenlion/PHP-SQL-Parser"
+            },
+            "time": "2023-03-09T20:54:23+00:00"
+        },
         {
             "name": "league/commonmark",
             "version": "2.4.1",
@@ -467,16 +527,16 @@
         },
         {
             "name": "nette/schema",
-            "version": "v1.2.4",
+            "version": "v1.2.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/nette/schema.git",
-                "reference": "c9ff517a53903b3d4e29ec547fb20feecb05b8ab"
+                "reference": "0462f0166e823aad657c9224d0f849ecac1ba10a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nette/schema/zipball/c9ff517a53903b3d4e29ec547fb20feecb05b8ab",
-                "reference": "c9ff517a53903b3d4e29ec547fb20feecb05b8ab",
+                "url": "https://api.github.com/repos/nette/schema/zipball/0462f0166e823aad657c9224d0f849ecac1ba10a",
+                "reference": "0462f0166e823aad657c9224d0f849ecac1ba10a",
                 "shasum": ""
             },
             "require": {
@@ -523,9 +583,9 @@
             ],
             "support": {
                 "issues": "https://github.com/nette/schema/issues",
-                "source": "https://github.com/nette/schema/tree/v1.2.4"
+                "source": "https://github.com/nette/schema/tree/v1.2.5"
             },
-            "time": "2023-08-05T18:56:25+00:00"
+            "time": "2023-10-05T20:37:59+00:00"
         },
         {
             "name": "nette/utils",
@@ -1089,20 +1149,21 @@
         },
         {
             "name": "phpgt/database",
-            "version": "dev-dynamic-sets",
+            "version": "dev-318-semicolon",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PhpGt/Database.git",
-                "reference": "4e48d3d390d0a54be969636535dfaa1e1def82b5"
+                "reference": "8ab44c9a8193bc258ecc6c8ec921b33a78945ac7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PhpGt/Database/zipball/4e48d3d390d0a54be969636535dfaa1e1def82b5",
-                "reference": "4e48d3d390d0a54be969636535dfaa1e1def82b5",
+                "url": "https://api.github.com/repos/PhpGt/Database/zipball/8ab44c9a8193bc258ecc6c8ec921b33a78945ac7",
+                "reference": "8ab44c9a8193bc258ecc6c8ec921b33a78945ac7",
                 "shasum": ""
             },
             "require": {
                 "ext-pdo": "*",
+                "greenlion/php-sql-parser": "^4.6",
                 "php": ">=8.1",
                 "phpgt/cli": "^1.3",
                 "phpgt/config": "^v1.1.0"
@@ -1144,7 +1205,7 @@
             "description": "Database API organisation.",
             "support": {
                 "issues": "https://github.com/PhpGt/Database/issues",
-                "source": "https://github.com/PhpGt/Database/tree/dynamic-sets"
+                "source": "https://github.com/PhpGt/Database/tree/318-semicolon"
             },
             "funding": [
                 {
@@ -1152,7 +1213,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2023-08-18T11:21:10+00:00"
+            "time": "2023-10-11T23:23:50+00:00"
         },
         {
             "name": "phpgt/dataobject",
@@ -3353,16 +3414,16 @@
         },
         {
             "name": "composer/pcre",
-            "version": "3.1.0",
+            "version": "3.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/pcre.git",
-                "reference": "4bff79ddd77851fe3cdd11616ed3f92841ba5bd2"
+                "reference": "00104306927c7a0919b4ced2aaa6782c1e61a3c9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/pcre/zipball/4bff79ddd77851fe3cdd11616ed3f92841ba5bd2",
-                "reference": "4bff79ddd77851fe3cdd11616ed3f92841ba5bd2",
+                "url": "https://api.github.com/repos/composer/pcre/zipball/00104306927c7a0919b4ced2aaa6782c1e61a3c9",
+                "reference": "00104306927c7a0919b4ced2aaa6782c1e61a3c9",
                 "shasum": ""
             },
             "require": {
@@ -3404,7 +3465,7 @@
             ],
             "support": {
                 "issues": "https://github.com/composer/pcre/issues",
-                "source": "https://github.com/composer/pcre/tree/3.1.0"
+                "source": "https://github.com/composer/pcre/tree/3.1.1"
             },
             "funding": [
                 {
@@ -3420,7 +3481,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-11-17T09:50:14+00:00"
+            "time": "2023-10-11T07:11:09+00:00"
         },
         {
             "name": "composer/xdebug-handler",
@@ -3547,16 +3608,16 @@
         },
         {
             "name": "friends-of-behat/mink-extension",
-            "version": "v2.7.3",
+            "version": "v2.7.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/FriendsOfBehat/MinkExtension.git",
-                "reference": "b1ccaef9136f62c8efaad88b966345dd68374fa9"
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+                "dev",
                 "mess detection",
                 "mess detector",
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-                "source": "https://github.com/phpmd/phpmd/tree/2.13.0"
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@@ -4830,16 +4892,16 @@
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@@ -5019,16 +5081,16 @@
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-                "source": "https://github.com/sebastianbergmann/exporter/tree/5.1.0"
+                "source": "https://github.com/sebastianbergmann/exporter/tree/5.1.1"
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@@ -5093,7 +5155,7 @@
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-            "time": "2023-09-18T07:15:37+00:00"
+            "time": "2023-09-24T13:22:09+00:00"
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@@ -5856,16 +5918,16 @@
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             "name": "symfony/dependency-injection",
-            "version": "v6.3.4",
+            "version": "v6.3.5",
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                 "url": "https://github.com/symfony/dependency-injection.git",
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@@ -5917,7 +5979,7 @@
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             "homepage": "https://symfony.com",
             "support": {
-                "source": "https://github.com/symfony/dependency-injection/tree/v6.3.4"
+                "source": "https://github.com/symfony/dependency-injection/tree/v6.3.5"
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@@ -5933,7 +5995,7 @@
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+            "time": "2023-09-25T16:46:40+00:00"
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@@ -6223,16 +6285,16 @@
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-            "version": "v6.3.2",
+            "version": "v6.3.5",
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                 "url": "https://github.com/symfony/http-client.git",
-                "reference": "15f9f4bad62bfcbe48b5dedd866f04a08fc7ff00"
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@@ -6295,7 +6357,7 @@
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+                "source": "https://github.com/symfony/http-client/tree/v6.3.5"
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+            "time": "2023-09-29T15:57:12+00:00"
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@@ -6393,16 +6455,16 @@
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-            "version": "v6.3.3",
+            "version": "v6.3.5",
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                 "url": "https://github.com/symfony/mime.git",
-                "reference": "9a0cbd52baa5ba5a5b1f0cacc59466f194730f98"
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@@ -6457,7 +6519,7 @@
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-                "source": "https://github.com/symfony/mime/tree/v6.3.3"
+                "source": "https://github.com/symfony/mime/tree/v6.3.5"
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@@ -6473,7 +6535,7 @@
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-            "time": "2023-07-31T07:08:24+00:00"
+            "time": "2023-09-29T06:59:36+00:00"
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@@ -7052,16 +7114,16 @@
         },
         {
             "name": "symfony/string",
-            "version": "v6.3.2",
+            "version": "v6.3.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/string.git",
-                "reference": "53d1a83225002635bca3482fcbf963001313fb68"
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-                "reference": "53d1a83225002635bca3482fcbf963001313fb68",
+                "url": "https://api.github.com/repos/symfony/string/zipball/13d76d0fb049051ed12a04bef4f9de8715bea339",
+                "reference": "13d76d0fb049051ed12a04bef4f9de8715bea339",
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@@ -7118,7 +7180,7 @@
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             "support": {
-                "source": "https://github.com/symfony/string/tree/v6.3.2"
+                "source": "https://github.com/symfony/string/tree/v6.3.5"
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@@ -7134,7 +7196,7 @@
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-            "time": "2023-07-05T08:41:27+00:00"
+            "time": "2023-09-18T10:38:32+00:00"
         },
         {
             "name": "symfony/translation",
@@ -7509,9 +7571,9 @@
     "aliases": [
         {
             "package": "phpgt/database",
-            "version": "dev-dynamic-sets",
-            "alias": "v1.5.0",
-            "alias_normalized": "1.5.0.0"
+            "version": "dev-318-semicolon",
+            "alias": "v1.4.0",
+            "alias_normalized": "1.4.0.0"
         }
     ],
     "minimum-stability": "stable",
diff --git a/data/web-content/upload-fail.md b/data/web-content/upload-fail.md
new file mode 100644
index 0000000..8a51f75
--- /dev/null
+++ b/data/web-content/upload-fail.md
@@ -0,0 +1,20 @@
+# Why did your upload fail?
+
+<section>
+
+### We're still building TrackShift, and learning all the time about the different formats that sales reports come in. 
+
+### The reason your upload failed is probably one of these...
+
+_- We haven't seen one like it before, so TrackShift doesn't know what it is._
+
+If this is the case, we're happy because we can easily teach TrackShift to process a new type of upload.
+
+_- It's got something in it that causes processing to fail._
+
+Again, we can teach TrackShift what to do if this is what's happening.
+
+_- It's not a file type that we support._
+
+Currently, TrackShift is built to handle sales report files. These normally come in .csv format. TrackShift can't process PDFs, JPGs or anything like that. We'd love to talk to you about what files you have though, so [get in touch](mailto:biff@trackshift.app). 
+</section>
diff --git a/page/_common.php b/page/_common.php
index 441b832..4264d03 100644
--- a/page/_common.php
+++ b/page/_common.php
@@ -3,7 +3,9 @@
 use Gt\Dom\Element;
 use Gt\Dom\HTMLDocument;
 use Gt\DomTemplate\DocumentBinder;
+use SHIFT\Trackshift\Audit\AuditRepository;
 use SHIFT\Trackshift\Auth\User;
+use SHIFT\Trackshift\Auth\UserRepository;
 use SHIFT\Trackshift\Content\ContentRepository;
 use SHIFT\Trackshift\Egg\UploadMessageList;
 use SHIFT\Trackshift\Upload\UploadManager;
@@ -30,3 +32,9 @@ function go(
 		$binder->bindList(new UploadMessageList(3), $fileUploader);
 	}
 }
+
+function go_after(?User $user, AuditRepository $auditRepository, HTMLDocument $document):void {
+	if($user && $auditRepository->isNewNotification($user)) {
+		$document->querySelector("global-header .bell")->classList->add("notify");
+	}
+}
diff --git a/page/_component/account-tabs.html b/page/_component/account-tabs.html
index bf3d3af..3ccda0c 100644
--- a/page/_component/account-tabs.html
+++ b/page/_component/account-tabs.html
@@ -8,4 +8,7 @@
 	<li>
 		<a href="/account/costs/">Costs</a>
 	</li>
+	<li>
+		<a href="/account/splits/">Splits</a>
+	</li>
 </ul>
diff --git a/page/_component/audit-list.html b/page/_component/audit-list.html
index 07496b1..d9a6bd4 100644
--- a/page/_component/audit-list.html
+++ b/page/_component/audit-list.html
@@ -1,5 +1,5 @@
 <ul>
-	<li data-list data-bind:data-type="type">
+	<li data-list data-bind:data-type="type" data-bind:class=":isNotification notification">
 		<time data-bind:text="timestamp">00:00</time>
 		<div data-bind:html="html">Something happened</div>
 	</li>
diff --git a/page/_component/cost-editor.html b/page/_component/cost-editor.html
index 0c1ff6d..e99104e 100644
--- a/page/_component/cost-editor.html
+++ b/page/_component/cost-editor.html
@@ -1,5 +1,3 @@
-<account-tabs />
-
 <form method="post" onchange="this.submit()">
 	<label>
 		<span>Artist</span>
@@ -43,6 +41,6 @@
 	link.addEventListener("click", e => {
 		e.preventDefault();
 		location.href = "about:blank";
-	});	
+	});
 }
 </script>
diff --git a/page/_component/cost-table.html b/page/_component/cost-table.html
index c81d034..f64c5af 100644
--- a/page/_component/cost-table.html
+++ b/page/_component/cost-table.html
@@ -20,7 +20,7 @@
 			<td data-bind:text="product.artist.name">Artist Name</td>
 			<td data-bind:text="product.title">Product Title</td>
 			<td data-bind:text="amount">0.00</td>
-			<td data-bind:text="description">The description of the cost</td>	
+			<td data-bind:text="description">The description of the cost</td>
 			<td data-bind:text="addedOn">1st Jan 1970</td>
 			<td class="centered">
 				<a href="/account/costs/{{id}}" target="modal">Edit</a>
@@ -35,7 +35,7 @@
 	</tbody>
 </table>
 
-<iframe src="about:blank" name="modal" onload="this.dataset.loaded=this.contentWindow.location.pathname" />
+<modal-popup />
 
 <script>
 	function myFunction() {
@@ -59,4 +59,4 @@
 		}
 	  }
 	}
-</script>
\ No newline at end of file
+</script>
diff --git a/page/_component/file-uploader.html b/page/_component/file-uploader.html
index d7cd6e1..ae66a8a 100644
--- a/page/_component/file-uploader.html
+++ b/page/_component/file-uploader.html
@@ -8,6 +8,7 @@
 				<span class="mobile-text">Upload sales report</span>
 			</a>
 		</p>
+
 		<input type="file" name="upload[]" multiple required/>
 	</label>
 	<button name="do" value="upload" class="button">Upload</button>
diff --git a/page/_component/global-header.html b/page/_component/global-header.html
index 460dba2..66e1cd8 100644
--- a/page/_component/global-header.html
+++ b/page/_component/global-header.html
@@ -2,8 +2,8 @@
 	<h1 class="brand"><a href="/">TrackShift</a></h1>
 
 	<nav>
-		<ul>
-			<li>
+		<menu>
+			<li class="bell">
 				<a href="/account/audit/">
 					<span>Notifications</span>
 				</a>
@@ -13,7 +13,7 @@ <h1 class="brand"><a href="/">TrackShift</a></h1>
 					<span>Account</span>
 				</a>
 			</li>
-		</ul>
+		</menu>
 	</nav>
 
 	<file-uploader />
diff --git a/page/_component/modal-popup.html b/page/_component/modal-popup.html
new file mode 100644
index 0000000..2814806
--- /dev/null
+++ b/page/_component/modal-popup.html
@@ -0,0 +1 @@
+<iframe src="about:blank" name="modal" onload="this.dataset.loaded=this.contentWindow.location.pathname" />
diff --git a/page/_component/split-editor.html b/page/_component/split-editor.html
new file mode 100644
index 0000000..bed045e
--- /dev/null
+++ b/page/_component/split-editor.html
@@ -0,0 +1,70 @@
+<div class="artist-product-picker">
+	<form method="post" onchange="this.submit()">
+		<label>
+			<span>Artist</span>
+			<select name="artist" required data-bind:value="@name">
+				<option></option>
+				<option data-list data-bind:text="name" data-bind:value="id">Artist</option>
+			</select>
+		</label>
+		<div class="actions auto-submit">
+			<button name="do" value="set-artist">Set artist</button>
+		</div>
+	</form>
+
+	<form method="post" onchange="this.submit()">
+		<input type="hidden" name="artist" data-bind:value="@name" />
+
+		<label>
+			<span>Product</span>
+			<select name="product" required data-bind:value="@name" data-bind:disabled="?!artist">
+				<option></option>
+				<option data-list data-bind:text="title" data-bind:value="id">Product</option>
+			</select>
+		</label>
+		<div class="actions auto-submit">
+			<button name="do" value="set-product">Set artist</button>
+		</div>
+	</form>
+</div>
+
+<div class="split-percentage-list" method="post">
+	<form class="split-percentage" method="post" data-list>
+		<input type="hidden" name="artist" data-bind:value="@name" />
+		<input type="hidden" name="product" data-bind:value="@name" />
+		<input type="hidden" name="id" data-bind:value="splitPercentage" />
+
+		<label class="owner">
+			<span>Split owner</span>
+			<input name="owner[]" required />
+		</label>
+		<label class="amount">
+			<span>Amount</span>
+			<input name="percentage[]" type="number" required />
+		</label>
+		<label class="contact">
+			<span>Contact details</span>
+			<input name="email[]" autocomplete="off" />
+		</label>
+		<div class="split-actions">
+			<button name="do" value="add-split"><span>Add</span></button>
+			<button name="do" value="delete-split"><span>Delete</span></button>
+		</div>
+	</form>
+	<div class="actions">
+		<button name="do" value="save">Save</button>
+		<button name="do" value="delete">Delete</button>
+		<a href="/account/splits/">Cancel</a>
+	</div>
+</div>
+
+<script>
+	if(window !== window.top) {
+		document.body.classList.add("modal");
+		let link=document.querySelector(".actions a");
+		link.addEventListener("click", e => {
+			e.preventDefault();
+			location.href = "about:blank";
+		});
+	}
+</script>
diff --git a/page/_component/splits-list.html b/page/_component/splits-list.html
new file mode 100644
index 0000000..d90e9e5
--- /dev/null
+++ b/page/_component/splits-list.html
@@ -0,0 +1,32 @@
+<div class="actions">
+	<a href="/account/splits/_new/" target="modal" class="button">Add new split</a>
+</div>
+
+<ul>
+	<li data-list>
+		<div>
+			<h1>Artist name</h1>
+			<h2>Product title</h2>
+			<a href="/account/splits/{{id}}">Edit</a>
+		</div>
+
+		<table>
+			<thead>
+				<tr>
+					<th>Party</th>
+					<th>Percentage split</th>
+					<th>Email</th>
+				</tr>
+			</thead>
+			<tbody>
+				<tr>
+					<td>You</td>
+					<td>100%</td>
+					<td></td>
+				</tr>
+			</tbody>
+		</table>
+	</li>
+</ul>
+
+<modal-popup />
diff --git a/page/account/audit.php b/page/account/audit.php
index da27bd3..1d7b746 100644
--- a/page/account/audit.php
+++ b/page/account/audit.php
@@ -5,4 +5,5 @@
 
 function go(DocumentBinder $binder, AuditRepository $auditRepository, User $user):void {
 	$binder->bindList($auditRepository->getAll($user));
+	$auditRepository->checkNotifications($user);
 }
diff --git a/page/account/costs/@cost.html b/page/account/costs/@cost.html
index 5b880eb..6f47860 100644
--- a/page/account/costs/@cost.html
+++ b/page/account/costs/@cost.html
@@ -1 +1,2 @@
+<account-tabs />
 <cost-editor />
diff --git a/page/account/products.php b/page/account/products.php
index 4d4fc06..d1b223c 100644
--- a/page/account/products.php
+++ b/page/account/products.php
@@ -3,6 +3,10 @@
 use SHIFT\Trackshift\Auth\User;
 use SHIFT\Trackshift\Product\ProductRepository;
 
-function go(DocumentBinder $binder, ProductRepository $productRepository, User $user):void {
+function go(
+	DocumentBinder $binder,
+	ProductRepository $productRepository,
+	User $user,
+):void {
 	$binder->bindList($productRepository->getProductEarnings($user));
 }
diff --git a/page/account/splits/@split.html b/page/account/splits/@split.html
new file mode 100644
index 0000000..d70bdcb
--- /dev/null
+++ b/page/account/splits/@split.html
@@ -0,0 +1,2 @@
+<account-tabs />
+<split-editor />
diff --git a/page/account/splits/@split.php b/page/account/splits/@split.php
new file mode 100644
index 0000000..255fb6e
--- /dev/null
+++ b/page/account/splits/@split.php
@@ -0,0 +1,60 @@
+<?php
+
+use Gt\Dom\HTMLDocument;
+use Gt\DomTemplate\DocumentBinder;
+use Gt\Input\Input;
+use Gt\Routing\Path\DynamicPath;
+use SHIFT\Trackshift\Artist\ArtistRepository;
+use SHIFT\Trackshift\Auth\User;
+use SHIFT\Trackshift\Product\ProductRepository;
+use SHIFT\Trackshift\Split\EmptySplitPercentage;
+use SHIFT\Trackshift\Split\SplitRepository;
+
+function go(
+	HTMLDocument $document,
+	DocumentBinder $binder,
+	DynamicPath $dynamicPath,
+	Input $input,
+	ArtistRepository $artistRepository,
+	ProductRepository $productRepository,
+	SplitRepository $splitRepository,
+	User $user,
+):void {
+	$artistId = $input->getString("artist");
+	$productId = $input->getString("product");
+	$id = $dynamicPath->get("split");
+
+	$percentageList = $splitRepository->getPercentageList($user, $productId);
+	array_push($percentageList, new EmptySplitPercentage());
+	array_push($percentageList, new RemainderSplitPercentage());
+
+	if($id === "_new") {
+		$document->querySelector("button[name=do][value=save]")->textContent = "Create";
+		$document->querySelector("button[name=do][value=delete]")->remove();
+	}
+	else {
+
+	}
+
+	$binder->bindList(
+		$percentageList,
+		$document->querySelector(".split-percentage-list"),
+	);
+
+	$binder->bindList(
+		$artistRepository->getAll($user),
+		$document->querySelector("select[name=artist]"),
+	);
+
+	if($artistId) {
+		$binder->bindKeyValue("artist", $artistId);
+
+		$binder->bindList(
+			$productRepository->getForArtist($artistId),
+			$document->querySelector("select[name=product]"),
+		);
+	}
+	if($productId) {
+		$binder->bindKeyValue("product", $productId);
+	}
+}
diff --git a/page/account/splits/index.html b/page/account/splits/index.html
new file mode 100644
index 0000000..8578ba8
--- /dev/null
+++ b/page/account/splits/index.html
@@ -0,0 +1,2 @@
+<account-tabs />
+<splits-list />
diff --git a/page/upload-fail.html b/page/upload-fail.html
new file mode 100644
index 0000000..e0a08b5
--- /dev/null
+++ b/page/upload-fail.html
@@ -0,0 +1,6 @@
+<article data-content="upload-fail">
+	<h1 class="page-title">Placeholder heading</h1>
+	<h2>Placeholder subheading</h2>
+	<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Animi fugiat illo iusto laboriosam nihil, quasi recusandae voluptas! A consequatur delectus dolore eos itaque minus officia perspiciatis praesentium quidem? Ipsam, provident!</p>
+	<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A at inventore iste nihil nisi quibusdam quidem rerum voluptas. Asperiores assumenda commodi cumque excepturi fugiat, magnam officiis quae qui sint voluptatibus.</p>
+</article>
diff --git a/query/Audit/getLatest.sql b/query/Audit/getLatest.sql
new file mode 100644
index 0000000..276306c
--- /dev/null
+++ b/query/Audit/getLatest.sql
@@ -0,0 +1,13 @@
+select
+	*
+
+from
+	Audit
+
+where
+	userId = ?
+
+order by
+	id desc
+
+limit 1
diff --git a/query/Audit/getLatestNotification.sql b/query/Audit/getLatestNotification.sql
new file mode 100644
index 0000000..86cb7e6
--- /dev/null
+++ b/query/Audit/getLatestNotification.sql
@@ -0,0 +1,15 @@
+select
+	*
+
+from
+	Audit
+
+where
+	userId = ?
+and
+	isNotification = true
+
+order by
+	id desc
+
+limit 1
diff --git a/query/Audit/insertNotification.sql b/query/Audit/insertNotification.sql
new file mode 100644
index 0000000..5e6b3b7
--- /dev/null
+++ b/query/Audit/insertNotification.sql
@@ -0,0 +1,16 @@
+insert into Audit (
+	id,
+	userId,
+	isNotification,
+	type,
+	description,
+	valueId
+)
+values (
+	:id,
+	:userId,
+	true,
+	'notification',
+	:description,
+	:valueId
+)
diff --git a/query/Cost/create.sql b/query/Cost/create.sql
index 45bb9f1..c306607 100644
--- a/query/Cost/create.sql
+++ b/query/Cost/create.sql
@@ -1,12 +1,14 @@
 insert into Cost(
 	id,
 	productId,
+	userId,
 	description,
 	amount
 )
 values (
 	:id,
 	:productId,
+	:userId,
 	:description,
 	:amount
 )
diff --git a/query/Cost/getAllForUser.sql b/query/Cost/getAllForUser.sql
index 8b7dce3..f4ba1d3 100644
--- a/query/Cost/getAllForUser.sql
+++ b/query/Cost/getAllForUser.sql
@@ -1,6 +1,7 @@
 select distinct
 	Cost.id,
 	Cost.productId,
+	Cost.userId,
 	Cost.description,
 	Cost.amount
 
@@ -17,22 +18,8 @@ inner join
 on
 	Artist.id = Product.artistId
 
-inner join
-	UsageOfProduct
-on
-	UsageOfProduct.productId = Product.id
-
-inner join
-	Usage
-on
-	Usage.id = UsageOfProduct.usageId
-
-inner join
-	Upload
-on
-	Upload.id = Usage.uploadId
-and
-	Upload.userId = ?
+where
+	Cost.userId = ?
 
 order by
 	Artist.name, Product.title
diff --git a/query/User/getById.sql b/query/User/getById.sql
new file mode 100644
index 0000000..438d266
--- /dev/null
+++ b/query/User/getById.sql
@@ -0,0 +1,9 @@
+select
+	id,
+	notificationCheckedAt
+
+from
+	User
+
+where
+	id = ?
diff --git a/query/User/getLastNotificationCheckTime.sql b/query/User/getLastNotificationCheckTime.sql
new file mode 100644
index 0000000..42bc844
--- /dev/null
+++ b/query/User/getLastNotificationCheckTime.sql
@@ -0,0 +1,7 @@
+select
+	notificationCheckedAt
+from
+	User
+
+where
+	id = ?
diff --git a/query/User/setNotificationCheckedAt.sql b/query/User/setNotificationCheckedAt.sql
new file mode 100644
index 0000000..db370ef
--- /dev/null
+++ b/query/User/setNotificationCheckedAt.sql
@@ -0,0 +1,6 @@
+update User
+set
+	notificationCheckedAt = :checkedAt
+
+where
+	id = :userId
diff --git a/query/_migration/010-cost-user.sql b/query/_migration/010-cost-user.sql
new file mode 100644
index 0000000..d9f256b
--- /dev/null
+++ b/query/_migration/010-cost-user.sql
@@ -0,0 +1,15 @@
+drop table Cost;
+
+create table Cost
+(
+    id          text           not null
+        primary key,
+    productId   text           not null
+        references Product
+            on update cascade on delete cascade,
+    userId      text           not null
+        constraint Cost_User_id_fk
+            references User,
+    description text,
+    amount      decimal(10, 6) not null
+);
diff --git a/query/_migration/011-split.sql b/query/_migration/011-split.sql
new file mode 100644
index 0000000..bfbb69e
--- /dev/null
+++ b/query/_migration/011-split.sql
@@ -0,0 +1,9 @@
+create table Split
+(
+    id        text not null
+        primary key,
+    userId    text not null
+        references User
+            on update cascade on delete cascade,
+    productId text not null
+);
diff --git a/query/_migration/012-split-percentage.sql b/query/_migration/012-split-percentage.sql
new file mode 100644
index 0000000..039ed4f
--- /dev/null
+++ b/query/_migration/012-split-percentage.sql
@@ -0,0 +1,11 @@
+create table SplitPercentage
+(
+    id         text           not null
+        primary key,
+    splitId    text           not null
+        references Split
+            on update cascade on delete cascade,
+    owner       text           not null,
+    percentage decimal(10, 6) not null,
+    email      text
+);
diff --git a/style/component/account-tabs.scss b/style/component/account-tabs.scss
index 7c806ee..c3488ba 100644
--- a/style/component/account-tabs.scss
+++ b/style/component/account-tabs.scss
@@ -2,6 +2,7 @@ account-tabs {
 	@extend %o-container;
 	display: block;
 	margin-top: 4rem;
+	overflow-x: scroll;
 
 	ul {
 		list-style-type: none;
diff --git a/style/component/audit-list.scss b/style/component/audit-list.scss
index ba68545..f90fc7f 100644
--- a/style/component/audit-list.scss
+++ b/style/component/audit-list.scss
@@ -16,6 +16,12 @@ audit-list {
 			border-radius: 0.5rem;
 			margin-bottom:1rem;
 			transition: ease-in-out 0.3s;
+
+			&.notification {
+				box-shadow: inset 0 0 0 4px red;
+				font-weight: bold;
+			}
+
 			>div {
 				@extend %d-info-text;
 				margin-top: 0.75rem;
diff --git a/style/component/cost-editor.scss b/style/component/cost-editor.scss
index c830d9b..c94b108 100644
--- a/style/component/cost-editor.scss
+++ b/style/component/cost-editor.scss
@@ -8,8 +8,4 @@ cost-editor {
 			margin-left:0.75rem;
 		}
 	}
-
-	.auto-submit {
-		display: none;
-	}
 }
diff --git a/style/component/global-header.scss b/style/component/global-header.scss
index 3b56e75..2530cd7 100644
--- a/style/component/global-header.scss
+++ b/style/component/global-header.scss
@@ -35,7 +35,7 @@ global-header {
 
 		nav {
 			position: relative;
-			top: 0rem;
+			top: 0;
 			left: 0;
 			right: 0;
 			display: flex;
@@ -49,7 +49,7 @@ global-header {
 				left: auto;
 			}
 
-			ul {
+			menu {
 				display: flex;
 				list-style-type: none;
 				margin: 0;
@@ -91,8 +91,12 @@ global-header {
 								mask-size: calc(100% - 1rem);
 								background-color: rgba(black, 0.5);
 							}
+						}
+					}
 
-							&.notify::before {
+					&.notify {
+						a {
+							&::before {
 								background-color: red;
 							}
 						}
diff --git a/style/component/split-editor.scss b/style/component/split-editor.scss
new file mode 100644
index 0000000..5defccf
--- /dev/null
+++ b/style/component/split-editor.scss
@@ -0,0 +1,84 @@
+split-editor {
+	@extend %o-container, %d-modal-content;
+	max-width: 46rem;
+	body:not(.modal) & {
+		margin-top: 4rem;
+	}
+
+	.artist-product-picker {
+		display: flex;
+		gap: 1rem;
+		justify-content: stretch;
+
+		form {
+			flex-grow: 1;
+			width: calc(50% - 1rem);
+
+			select {
+				width: 100%;
+			}
+		}
+	}
+
+	form {
+		@extend %d-form-fields;
+	}
+
+	.split-percentage-list {
+		form.split-percentage {
+			display: flex;
+			gap: 1rem;
+
+			&:last-of-type {
+				button[name=do][value=delete-split] {
+					display: none;
+				}
+			}
+
+			label {
+				&.owner {
+					width: 25%;
+				}
+				&.amount {
+					width: 15%
+				}
+				&.contact {
+
+				}
+			}
+
+			.split-actions {
+				display: flex;
+				align-items: flex-end;
+				gap: 1rem;
+				margin-bottom: 1rem;
+
+				button{
+					height: 2.5rem;
+
+					&::before {
+						content: "";
+						display: block;
+						width: 1rem;
+						aspect-ratio: 1;
+						background-size: 100%;
+						background-position: center;
+						background-repeat: no-repeat;
+					}
+
+					&[name=do][value=add-split]::before {
+						background-image: url("/asset/icon/plus-solid.svg");
+					}
+
+					&[name=do][value=delete-split]::before {
+						background-image: url("/asset/icon/minus-solid.svg");
+					}
+
+					span {
+						display: none;
+					}
+				}
+			}
+		}
+	}
+}
diff --git a/style/component/splits-list.scss b/style/component/splits-list.scss
new file mode 100644
index 0000000..ac544a3
--- /dev/null
+++ b/style/component/splits-list.scss
@@ -0,0 +1,64 @@
+splits-list {
+	@extend %o-container;
+	margin-top: 2rem;
+
+	.actions {
+		margin: 1rem 0;
+	}
+
+	ul {
+		list-style-type: none;
+		margin: 0;
+		padding: 0;
+		margin-top: 1rem;
+		border: var(--theme-ui-border);
+		border-radius: var(--theme-ui-border-radius);
+
+		&:empty {
+			&::before {
+				content: "There are currently no splits added";
+				font-style: italic;
+				display: block;
+				padding: 2rem;
+				text-align: center;
+			}
+		}
+
+		li {
+			>div {
+				display: flex;
+				justify-content: space-between;
+				background-color: var(--pal-utility-light-1);
+				border-bottom: var(--theme-ui-border);
+			}
+		}
+	}
+
+	h1, h2 {
+		margin: 0;
+		padding: 1rem;
+		font-size: 1rem;
+	}
+	h2 {
+		margin-right: auto;
+	}
+	a {
+		display: block;
+		padding: 1rem;
+		margin-left: auto
+	}
+
+	table {
+		thead {
+			display: none;
+		}
+
+		tbody {
+			tr {
+				td {
+					padding: 1rem;
+				}
+			}
+		}
+	}
+}
diff --git a/style/decorator/data-table.scss b/style/decorator/data-table.scss
index 10abc72..27a00a1 100644
--- a/style/decorator/data-table.scss
+++ b/style/decorator/data-table.scss
@@ -1,7 +1,6 @@
 %d-data-table {
 	@extend %o-container;
 	margin-top: 2rem;
-	overflow-x: scroll;
 
 	>.actions {
 		margin: 1rem 0;
diff --git a/style/decorator/form-fields.scss b/style/decorator/form-fields.scss
index 78fdafc..520778b 100644
--- a/style/decorator/form-fields.scss
+++ b/style/decorator/form-fields.scss
@@ -11,5 +11,12 @@
 
 	select, input {
 		@extend %d-ui-element;
+		width: 100%;
+	}
+
+	.actions:not(.auto-submit) {
+		display: flex;
+		align-items: center;
+		margin: 1rem 0;
 	}
 }
diff --git a/style/decorator/typography.scss b/style/decorator/typography.scss
index b1264e3..c783e1f 100644
--- a/style/decorator/typography.scss
+++ b/style/decorator/typography.scss
@@ -12,6 +12,7 @@
 
 	h1 {
 		font-size: var(--font-size-1);
+		margin-top:5rem;
 	}
 	h2 {
 		font-size: var(--font-size-2);
diff --git a/style/element/body.scss b/style/element/body.scss
index 34af462..8d556bf 100644
--- a/style/element/body.scss
+++ b/style/element/body.scss
@@ -4,6 +4,7 @@ body {
 	background-color: var(--pal-page-bg);
 	color: var(--pal-body);
 	font-family: var(--font-family-main);
+	overflow-x: hidden;
 
 	&.modal {
 		global-header, global-footer, account-tabs {
diff --git a/style/style.scss b/style/style.scss
index f3d81e5..3880bf8 100644
--- a/style/style.scss
+++ b/style/style.scss
@@ -40,6 +40,8 @@
 @import "component/cost-table";
 @import "component/product-table";
 @import "component/upload-table";
+@import "component/split-editor";
+@import "component/splits-list";
 
 @import "page/index";
 @import "page/_common";
@@ -57,6 +59,10 @@
 	transition: 1s;
 }
 
+.auto-submit { // when a form auto-submits, like the artist submit button in the modal cost editor
+	display: none;
+}
+
 body {
 	background-image: url("/asset/img/abstract/bg2.svg");
 	background-repeat: no-repeat;
@@ -139,4 +145,4 @@ input[type="text"] {
 	outline-color: var(--pal-utility-dark-1);
 	box-shadow:none !important;
 	margin-bottom:2rem
-}
+}
\ No newline at end of file
diff --git a/test/behat/Context/AnotherContext.php b/test/behat/Context/AnotherContext.php
deleted file mode 100644
index 4299416..0000000
--- a/test/behat/Context/AnotherContext.php
+++ /dev/null
@@ -1,7 +0,0 @@
-<?php
-namespace SHIFT\Trackshift\BehatContext;
-
-use Behat\MinkExtension\Context\RawMinkContext;
-
-class AnotherContext extends RawMinkContext {
-}
diff --git a/test/behat/Context/DebugContext.php b/test/behat/Context/DebugContext.php
new file mode 100644
index 0000000..095b289
--- /dev/null
+++ b/test/behat/Context/DebugContext.php
@@ -0,0 +1,13 @@
+<?php
+namespace SHIFT\Trackshift\BehatContext;
+
+use Behat\MinkExtension\Context\RawMinkContext;
+use PHPUnit\Framework\Assert as PHPUnit;
+
+class DebugContext extends PageContext {
+	/** @Then I dump the HTML */
+	public function iDumpTheHTML() {
+		echo $this->getSession()->getPage()->getHtml();
+		exit(1);
+	}
+}
diff --git a/test/behat/Context/FeatureContext.php b/test/behat/Context/FeatureContext.php
index ddf4996..af4f65c 100644
--- a/test/behat/Context/FeatureContext.php
+++ b/test/behat/Context/FeatureContext.php
@@ -85,10 +85,4 @@ public function iShouldSeeTheFollowingTableDataFor(string $artistName, TableNode
 			}
 		}
 	}
-
-	/** @Then I dump the HTML */
-	public function iDumpTheHTML() {
-		echo $this->getSession()->getPage()->getHtml();
-		exit(1);
-	}
 }
diff --git a/test/behat/Context/NotificationContext.php b/test/behat/Context/NotificationContext.php
new file mode 100644
index 0000000..c20e45e
--- /dev/null
+++ b/test/behat/Context/NotificationContext.php
@@ -0,0 +1,21 @@
+<?php
+namespace SHIFT\Trackshift\BehatContext;
+
+use Behat\Behat\Tester\Exception\PendingException;
+use PHPUnit\Framework\Assert as PHPUnit;
+
+class NotificationContext extends PageContext {
+	/** @Then I should have a notification */
+	public function iShouldHaveANotification():void {
+		$bell = $this->page->find("css", "global-header .bell");
+		PHPUnit::assertTrue($bell->hasClass("notify"));
+	}
+
+	/** @Given the latest notification should have the message :message */
+	public function theLatestNotificationShouldHaveTheMessage(string $message):void {
+		$this->getSession()->visit("/account/audit/");
+		$auditListFirstItem = $this->page->find("css", "audit-list>ul>li");
+		$messageDiv = $auditListFirstItem->find("css", "div");
+		PHPUnit::assertStringContainsString($message, $messageDiv->getText());
+	}
+}
diff --git a/test/behat/Context/ServerContext.php b/test/behat/Context/ServerContext.php
index 2a68ca3..db239f2 100644
--- a/test/behat/Context/ServerContext.php
+++ b/test/behat/Context/ServerContext.php
@@ -28,14 +28,21 @@ private static function checkServerRunning(
 		string $serverAddress,
 		int $serverPort,
 	):void {
-		$socket = @fsockopen(
-			"localhost",
-			$serverPort,
-			$errorCode,
-			$errorMessage,
-			1
-		);
-		if(!$socket) {
+		$socket = null;
+
+		while(!$socket) {
+			$socket = @fsockopen(
+				"localhost",
+				$serverPort,
+				$errorCode,
+				$errorMessage,
+				1
+			);
+
+			if($socket) {
+				break;
+			}
+
 			if(!is_dir("www")) {
 				mkdir("www");
 			}
@@ -43,6 +50,8 @@ private static function checkServerRunning(
 			self::$server = new Process("php", "-S", "$serverAddress:$serverPort", "-t", "www", "./vendor/phpgt/webengine/go.php");
 			self::$server->setExecCwd($path);
 			self::$server->exec();
+			sleep(1);
+			echo "Server started...", PHP_EOL;
 		}
 	}
 }
diff --git a/test/behat/Context/UploadContext.php b/test/behat/Context/UploadContext.php
index c3d5aad..ae49f3b 100644
--- a/test/behat/Context/UploadContext.php
+++ b/test/behat/Context/UploadContext.php
@@ -2,7 +2,6 @@
 namespace SHIFT\Trackshift\BehatContext;
 
 use Behat\Gherkin\Node\TableNode;
-use Behat\MinkExtension\Context\RawMinkContext;
 use PHPUnit\Framework\Assert as PHPUnit;
 
 class UploadContext extends PageContext {
diff --git a/test/behat/costs.feature b/test/behat/costs.feature
index 322344a..ca0b927 100644
--- a/test/behat/costs.feature
+++ b/test/behat/costs.feature
@@ -9,5 +9,21 @@ Feature: TrackShift should break down costs of products
 		And I press "Upload"
 		When I go to "/account/costs/"
 		Then I should see 0 rows in the table
-		When I go to "/account/products/"
-		Then I should see "Add Costs"
+
+	Scenario: A product can have a cost associated to it
+		Given I am on the homepage
+		And I attach the file "bandcamp-simple-3-songs.csv" to "upload[]"
+		And I press "Upload"
+		When I go to "/account/costs/"
+		And I follow "Add cost"
+		And I select "Person 1" from "artist"
+		And I press "Set artist"
+		And I select "BC 2" from "product"
+		And I fill in "description" with "Vinyl pressing"
+		And I fill in "amount" with "100.00"
+		And I press "Create"
+		Then I should be on "/account/costs/"
+		And I should see the following table data:
+			| Artist   | Product | Cost    | Description    |
+			| Person 1 | BC 2    | £100.00 | Vinyl pressing |
+
diff --git a/test/behat/upload-unknown.feature b/test/behat/upload-unknown.feature
new file mode 100644
index 0000000..522faf7
--- /dev/null
+++ b/test/behat/upload-unknown.feature
@@ -0,0 +1,11 @@
+Feature: App should handle Unknown uploaded files
+	In order to understand the limitations of the software
+	As a user
+	I should be alerted if my uploaded files are not understood
+
+	Scenario: Unknown file is alerted
+		Given I am on the homepage
+		When I attach the file "gubbins.txt" to "upload[]"
+		And I press "Upload"
+		Then I should have a notification
+		And the latest notification should have the message "Your latest upload was not processed (gubbins)"
diff --git a/test/phpunit/Upload/BandcampUploadTest.php b/test/phpunit/Upload/BandcampUploadTest.php
index 8bd9797..a247663 100644
--- a/test/phpunit/Upload/BandcampUploadTest.php
+++ b/test/phpunit/Upload/BandcampUploadTest.php
@@ -27,7 +27,7 @@ public function testExtractEarning():void {
 		self::assertSame(6.22, $earning->value);
 	}
 
-	public function testGetXYZ_bindGetters():void {
+	public function testGetCreatedUploadedDate_bindGetters():void {
 		$filePath = "test/files/bandcamp-simple-3-songs.csv";
 		$sut = new BandcampUpload("test-id", $filePath);
 		$actualCreationTime = new DateTime("@" . filectime($filePath));
diff --git a/test/phpunit/Upload/UnknownUploadTest.php b/test/phpunit/Upload/UnknownUploadTest.php
new file mode 100644
index 0000000..c0bfe93
--- /dev/null
+++ b/test/phpunit/Upload/UnknownUploadTest.php
@@ -0,0 +1,25 @@
+<?php
+namespace SHIFT\Trackshift\Test\Upload;
+
+use PHPUnit\Framework\TestCase;
+use SHIFT\Trackshift\Upload\UnknownUpload;
+
+class UnknownUploadTest extends TestCase {
+	public function testExtractArtistName():void {
+		$sut = new UnknownUpload("test-id", "test/files/gubbins.txt");
+		$dataRows = iterator_to_array($sut->generateDataRows());
+		self::assertSame("Unknown", $sut->extractArtistName($dataRows));
+	}
+
+	public function testExtractProductTitle():void {
+		$sut = new UnknownUpload("test-id", "test/files/gubbins.txt");
+		$dataRows = iterator_to_array($sut->generateDataRows());
+		self::assertSame("Unknown", $sut->extractProductTitle($dataRows));
+	}
+
+	public function testExtractEarning():void {
+		$sut = new UnknownUpload("test-id", "test/files/gubbins.txt");
+		$dataRows = iterator_to_array($sut->generateDataRows());
+		self::assertSame(0.0, $sut->extractEarning($dataRows)->value);
+	}
+}