diff --git a/.github/workflows/localgov_microsites.yml b/.github/workflows/localgov_microsites.yml
index beb2463..e9abd2e 100644
--- a/.github/workflows/localgov_microsites.yml
+++ b/.github/workflows/localgov_microsites.yml
@@ -21,15 +21,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        include:
-          - profile-version: '2.1.x'
-            project-version: '2.x'
-            drupal-version: '~9.4'
-            php-version: '8.1'
-          - profile-version: '3.x'
-            project-version: '3.x'
-            drupal-version: '~10.0'
-            php-version: '8.1'
+        profile-version:
+          - '4.x'
+        drupal-version:
+          - '~10.0'
+        php-version:
+          - '8.1'
+          - '8.2'
 
     steps:
 
@@ -107,15 +105,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        include:
-          - profile-version: '2.1.x'
-            project-version: '2.x'
-            drupal-version: '~9.4'
-            php-version: '8.1'
-          - profile-version: '3.x'
-            project-version: '3.x'
-            drupal-version: '~10.0'
-            php-version: '8.1'
+        profile-version:
+          - '4.x'
+        drupal-version:
+          - '~10.0'
+        php-version:
+          - '8.1'
+          - '8.2'
 
     steps:
 
@@ -145,15 +141,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        include:
-          - profile-version: '2.1.x'
-            project-version: '2.x'
-            drupal-version: '~9.4'
-            php-version: '8.1'
-          - profile-version: '3.x'
-            project-version: '3.x'
-            drupal-version: '~10.0'
-            php-version: '8.1'
+        profile-version:
+          - '4.x'
+        drupal-version:
+          - '~10.0'
+        php-version:
+          - '8.1'
+          - '8.2'
 
     steps:
 
@@ -182,15 +176,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        include:
-          - profile-version: '2.1.x'
-            project-version: '2.x'
-            drupal-version: '~9.4'
-            php-version: '8.1'
-          - profile-version: '3.x'
-            project-version: '3.x'
-            drupal-version: '~10.0'
-            php-version: '8.1'
+        profile-version:
+          - '4.x'
+        drupal-version:
+          - '~10.0'
+        php-version:
+          - '8.1'
+          - '8.2'
 
     steps:
 
diff --git a/composer.json b/composer.json
index 90c12a8..eb10b7a 100644
--- a/composer.json
+++ b/composer.json
@@ -7,6 +7,6 @@
     "require": {
         "drupal/twig_tweak": "^3.2",
         "localgovdrupal/localgov_base": "^1.0.0",
-        "localgovdrupal/localgov_microsites_group": "^2.0.0@beta || ^3.0.0@alpha || ^4.0.0@alpha "
+        "localgovdrupal/localgov_microsites_group": "^4.0.0-alpha3"
     }
 }
diff --git a/localgov_microsites_base.theme b/localgov_microsites_base.theme
index 2981923..f638443 100644
--- a/localgov_microsites_base.theme
+++ b/localgov_microsites_base.theme
@@ -13,18 +13,13 @@ use Drupal\views\ViewExecutable;
  */
 function localgov_microsites_base_preprocess_html(&$variables) {
 
-  $parent_group_id = \Drupal::service('domain_group_resolver')->getActiveDomainGroupId();
-  if ($parent_group_id) {
-    $group = \Drupal::entityTypeManager()->getStorage('group')->load($parent_group_id);
-  }
-  if (empty($group)) {
-    $group = \Drupal::request()->attributes->get('group');
-  }
+  // Load the group by context. See localgov_microsites_group.module.
+  $group = localgov_microsites_group_get_by_context();
 
   if ($group instanceof MicrositeGroupInterface) {
     // Adds classes that can be used to let CSS target specific microsites.
     $variables['attributes']['class'][] = 'lgd-ms';
-    $variables['attributes']['class'][] = 'lgd-ms--' . $parent_group_id;
+    $variables['attributes']['class'][] = 'lgd-ms--' . $group->id();
 
     // Styleguide primary colour.
     if (!is_null($group->get('lgms_primary_colour')[0])) {
@@ -444,16 +439,11 @@ function localgov_microsites_base_preprocess_node(&$variables) {
   $variables['content_type'] = $variables['node']->getType();
   $variables['teaser'] = $variables['view_mode'] == 'teaser';
 
-  $parent_group_id = \Drupal::service('domain_group_resolver')->getActiveDomainGroupId();
-  if ($parent_group_id) {
-    $group = \Drupal::entityTypeManager()->getStorage('group')->load($parent_group_id);
-  }
-  if (empty($group)) {
-    $group = \Drupal::request()->attributes->get('group');
-  }
+  // Load the group by context. See localgov_microsites_group.module.
+  $group = localgov_microsites_group_get_by_context();
 
   if ($group instanceof MicrositeGroupInterface) {
-    $front_page = \Drupal::config('domain.config.group_' . $parent_group_id . '.system.site')->get('page.front');
+    $front_page = \Drupal::config('domain.config.group_' . $group->id() . '.system.site')->get('page.front');
     $current_path = \Drupal::service('path.current')->getPath();
     $current_path_alias = \Drupal::service('path_alias.manager')->getAliasByPath($current_path);
 
@@ -527,13 +517,8 @@ function localgov_microsites_base_views_pre_render(ViewExecutable $view) {
 
     $view->element['#attached']['library'][] = 'localgov_microsites_base/view-events';
 
-    $parent_group_id = \Drupal::service('domain_group_resolver')->getActiveDomainGroupId();
-    if ($parent_group_id) {
-      $group = \Drupal::entityTypeManager()->getStorage('group')->load($parent_group_id);
-    }
-    else {
-      $group = \Drupal::request()->attributes->get('group');
-    }
+    // Load the group by context. See localgov_microsites_group.module.
+    $group = localgov_microsites_group_get_by_context();
 
     if (!is_null($group) && !empty($group->get('lgms_teaser_image_style')->getValue())) {
 
@@ -576,13 +561,8 @@ function localgov_microsites_base_preprocess_page(&$variables) {
   $variables['site_name'] = $config->get('name');
   $variables['site_slogan'] = $config->get('slogan');
 
-  $parent_group_id = \Drupal::service('domain_group_resolver')->getActiveDomainGroupId();
-  if ($parent_group_id) {
-    $group = \Drupal::entityTypeManager()->getStorage('group')->load($parent_group_id);
-  }
-  if (empty($group)) {
-    $group = \Drupal::request()->attributes->get('group');
-  }
+  // Load the group by context. See localgov_microsites_group.module.
+  $group = localgov_microsites_group_get_by_context();
 
   if ($group instanceof MicrositeGroupInterface) {