diff --git a/.idea/oliverdavies-uk.iml b/.idea/oliverdavies-uk.iml
index 1664e077d..96482bc73 100644
--- a/.idea/oliverdavies-uk.iml
+++ b/.idea/oliverdavies-uk.iml
@@ -6,6 +6,7 @@
       <sourceFolder url="file://$MODULE_DIR$/web/modules/custom/custom/tests/src" isTestSource="true" packagePrefix="Drupal\Tests\custom" />
       <sourceFolder url="file://$MODULE_DIR$/web/modules/custom/opd_talks/tests/src" isTestSource="true" packagePrefix="Drupal\Tests\opd_talks" />
       <sourceFolder url="file://$MODULE_DIR$/web/modules/custom/opd_talks/src" isTestSource="false" packagePrefix="Drupal\opd_talks" />
+      <sourceFolder url="file://$MODULE_DIR$/web/modules/custom/opdavies_blog/tests/src" isTestSource="true" packagePrefix="Drupal\Tests\opdavies_blog" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/asm89/stack-cors" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/behat/mink" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/behat/mink-browserkit-driver" />
diff --git a/web/modules/custom/opdavies_blog/opdavies_blog.services.yml b/web/modules/custom/opdavies_blog/opdavies_blog.services.yml
index 2f627f8fc..e27a66f60 100644
--- a/web/modules/custom/opdavies_blog/opdavies_blog.services.yml
+++ b/web/modules/custom/opdavies_blog/opdavies_blog.services.yml
@@ -3,5 +3,9 @@ services:
     tags:
       - { name: event_subscriber }
 
+  Drupal\opdavies_blog\EventSubscriber\ReorderBlogTags:
+    tags:
+      - { name: event_subscriber }
+
   Drupal\opdavies_blog\Repository\PostRepository:
     autowire: true
diff --git a/web/modules/custom/opdavies_blog/src/Entity/Node/Post.php b/web/modules/custom/opdavies_blog/src/Entity/Node/Post.php
index 7744d179b..cda1c152e 100644
--- a/web/modules/custom/opdavies_blog/src/Entity/Node/Post.php
+++ b/web/modules/custom/opdavies_blog/src/Entity/Node/Post.php
@@ -6,6 +6,8 @@ namespace Drupal\opdavies_blog\Entity\Node;
 
 use Drupal\discoverable_entity_bundle_classes\ContentEntityBundleInterface;
 use Drupal\node\Entity\Node;
+use Drupal\taxonomy\Entity\Term;
+use Illuminate\Support\Collection;
 
 /**
  * Defines an blog post node class.
@@ -24,6 +26,13 @@ class Post extends Node implements ContentEntityBundleInterface {
       : NULL;
   }
 
+  /**
+   * @return Collection|Term[]
+   */
+  public function getTags(): Collection {
+    return new Collection($this->get('field_tags')->referencedEntities());
+  }
+
   public function hasBeenSentToSocialMedia(): bool {
     return (bool) $this->get('field_sent_to_social_media')->getString();
   }
@@ -36,6 +45,10 @@ class Post extends Node implements ContentEntityBundleInterface {
     return (bool) $this->getExternalLink();
   }
 
+  public function setTags(array $tags): void {
+    $this->set('field_tags', $tags);
+  }
+
   public function toTweet(): string {
     // TODO: Add tags.
 
diff --git a/web/modules/custom/opdavies_blog/src/EventSubscriber/PushBlogPostToSocialMedia.php b/web/modules/custom/opdavies_blog/src/EventSubscriber/PushBlogPostToSocialMedia.php
index 70a4097f0..12b1e9fea 100644
--- a/web/modules/custom/opdavies_blog/src/EventSubscriber/PushBlogPostToSocialMedia.php
+++ b/web/modules/custom/opdavies_blog/src/EventSubscriber/PushBlogPostToSocialMedia.php
@@ -48,6 +48,10 @@ final class PushBlogPostToSocialMedia implements EventSubscriberInterface {
     $url = \Drupal::configFactory()->get('opdavies_talks.config')
       ->get('zapier_post_tweet_url');
 
+    if (!$url) {
+      return;
+    }
+
     \Drupal::httpClient()->post($url, [
       'form_params' => [
         'message' => $entity->toTweet(),
diff --git a/web/modules/custom/opdavies_blog/src/EventSubscriber/ReorderBlogTags.php b/web/modules/custom/opdavies_blog/src/EventSubscriber/ReorderBlogTags.php
new file mode 100644
index 000000000..8290550ed
--- /dev/null
+++ b/web/modules/custom/opdavies_blog/src/EventSubscriber/ReorderBlogTags.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\opdavies_blog\EventSubscriber;
+
+use Drupal\hook_event_dispatcher\Event\Entity\BaseEntityEvent;
+use Drupal\hook_event_dispatcher\HookEventDispatcherInterface;
+use Drupal\opdavies_blog\Entity\Node\Post;
+use Drupal\taxonomy\TermInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+final class ReorderBlogTags implements EventSubscriberInterface {
+
+  /**
+   * @inheritDoc
+   */
+  public static function getSubscribedEvents() {
+    return [
+      HookEventDispatcherInterface::ENTITY_PRE_SAVE => 'onEntityPreSave',
+    ];
+  }
+
+  public function onEntityPresave(BaseEntityEvent $event): void {
+    $entity = $event->getEntity();
+
+    if ($entity->getEntityTypeId() != 'node') {
+      return;
+    }
+
+    /** @var Post $entity */
+    if ($entity->bundle() != 'post') {
+      return;
+    }
+
+    $sortedTags = $entity->getTags()
+      ->sortBy(fn(TermInterface $tag) => $tag->label());
+
+    $entity->setTags($sortedTags->toArray());
+  }
+
+}
diff --git a/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.field.node.post.field_external_link.yml b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.field.node.post.field_external_link.yml
new file mode 100644
index 000000000..153e1f888
--- /dev/null
+++ b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.field.node.post.field_external_link.yml
@@ -0,0 +1,22 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_external_link
+    - node.type.post
+  module:
+    - link
+id: node.post.field_external_link
+field_name: field_external_link
+entity_type: node
+bundle: post
+label: 'External link'
+description: ''
+required: false
+translatable: false
+default_value: {  }
+default_value_callback: ''
+settings:
+  link_type: 16
+  title: 2
+field_type: link
diff --git a/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.field.node.post.field_sent_to_social_media.yml b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.field.node.post.field_sent_to_social_media.yml
new file mode 100644
index 000000000..0a69f39b5
--- /dev/null
+++ b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.field.node.post.field_sent_to_social_media.yml
@@ -0,0 +1,22 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_sent_to_social_media
+    - node.type.post
+id: node.post.field_sent_to_social_media
+field_name: field_sent_to_social_media
+entity_type: node
+bundle: post
+label: 'Sent to social media'
+description: ''
+required: false
+translatable: false
+default_value:
+  -
+    value: 0
+default_value_callback: ''
+settings:
+  on_label: 'On'
+  off_label: 'Off'
+field_type: boolean
diff --git a/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.field.node.post.field_tags.yml b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.field.node.post.field_tags.yml
new file mode 100644
index 000000000..9f7092d17
--- /dev/null
+++ b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.field.node.post.field_tags.yml
@@ -0,0 +1,28 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_tags
+    - node.type.post
+    - taxonomy.vocabulary.tags
+id: node.post.field_tags
+field_name: field_tags
+entity_type: node
+bundle: post
+label: Tags
+description: ''
+required: false
+translatable: false
+default_value: {  }
+default_value_callback: ''
+settings:
+  handler: 'default:taxonomy_term'
+  handler_settings:
+    target_bundles:
+      tags: tags
+    sort:
+      field: name
+      direction: asc
+    auto_create: true
+    auto_create_bundle: ''
+field_type: entity_reference
diff --git a/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.storage.node.field_external_link.yml b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.storage.node.field_external_link.yml
new file mode 100644
index 000000000..1e6d9b34b
--- /dev/null
+++ b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.storage.node.field_external_link.yml
@@ -0,0 +1,18 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - link
+    - node
+id: node.field_external_link
+field_name: field_external_link
+entity_type: node
+type: link
+settings: {  }
+module: link
+locked: false
+cardinality: 1
+translatable: true
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false
diff --git a/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.storage.node.field_sent_to_social_media.yml b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.storage.node.field_sent_to_social_media.yml
new file mode 100644
index 000000000..2aa2631e6
--- /dev/null
+++ b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.storage.node.field_sent_to_social_media.yml
@@ -0,0 +1,17 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - node
+id: node.field_sent_to_social_media
+field_name: field_sent_to_social_media
+entity_type: node
+type: boolean
+settings: {  }
+module: core
+locked: false
+cardinality: 1
+translatable: true
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false
diff --git a/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.storage.node.field_tags.yml b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.storage.node.field_tags.yml
new file mode 100644
index 000000000..73f821f2c
--- /dev/null
+++ b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/field.storage.node.field_tags.yml
@@ -0,0 +1,19 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - node
+    - taxonomy
+id: node.field_tags
+field_name: field_tags
+entity_type: node
+type: entity_reference
+settings:
+  target_type: taxonomy_term
+module: core
+locked: false
+cardinality: -1
+translatable: true
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false
diff --git a/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/taxonomy.vocabulary.tags.yml b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/taxonomy.vocabulary.tags.yml
new file mode 100644
index 000000000..f6cf44795
--- /dev/null
+++ b/web/modules/custom/opdavies_blog/tests/modules/opdavies_blog_test/config/install/taxonomy.vocabulary.tags.yml
@@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+name: Tags
+vid: tags
+description: 'Tags for categorising blog posts.'
+weight: 0
diff --git a/web/modules/custom/opdavies_blog/tests/src/Kernel/ReorderBlogTagsTest.php b/web/modules/custom/opdavies_blog/tests/src/Kernel/ReorderBlogTagsTest.php
new file mode 100644
index 000000000..2e1bb9907
--- /dev/null
+++ b/web/modules/custom/opdavies_blog/tests/src/Kernel/ReorderBlogTagsTest.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace Drupal\Tests\opdavies_blog\Kernel;
+
+use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
+use Drupal\node\Entity\Node;
+use Drupal\opdavies_blog\Entity\Node\Post;
+use Drupal\taxonomy\Entity\Vocabulary;
+use Drupal\taxonomy\TermInterface;
+use Drupal\taxonomy\VocabularyInterface;
+use Drupal\Tests\node\Traits\NodeCreationTrait;
+use Drupal\Tests\taxonomy\Traits\TaxonomyTestTrait;
+
+final class ReorderBlogTagsTest extends EntityKernelTestBase {
+
+  use NodeCreationTrait;
+  use TaxonomyTestTrait;
+
+  public static $modules = [
+    // Core.
+    'node',
+    'taxonomy',
+    'link',
+
+    // Contrib.
+    'discoverable_entity_bundle_classes',
+    'hook_event_dispatcher',
+
+    // Custom.
+    'opdavies_blog_test',
+    'opdavies_blog',
+  ];
+
+  /** @test */
+  public function it_reorders_tags_on_blog_posts_to_be_arranged_alphabetically(): void {
+    /** @var VocabularyInterface $vocabulary */
+    $vocabulary = Vocabulary::load('tags');
+
+    $this->createTerm($vocabulary, ['name' => 'Drupal']); // 1
+    $this->createTerm($vocabulary, ['name' => 'PHP']); // 2
+    $this->createTerm($vocabulary, ['name' => 'Symfony']); // 3
+
+    $post = $this->createNode([
+      'field_tags' => [3, 1, 2],
+      'type' => 'post',
+    ]);
+
+    /** @var Post $post */
+    $post = Node::load($post->id());
+
+    $this->assertSame(
+      ['Drupal', 'PHP', 'Symfony'],
+      $post->getTags()
+        ->map(fn(TermInterface $tag) => $tag->label())
+        ->toArray()
+    );
+  }
+
+  protected function setUp() {
+    parent::setUp();
+
+    $this->installConfig([
+      'filter',
+      'opdavies_blog_test',
+    ]);
+
+    $this->installEntitySchema('taxonomy_vocabulary');
+    $this->installEntitySchema('taxonomy_term');
+  }
+
+}