diff --git a/.github/workflows/coding-standards.yml b/.github/workflows/coding-standards.yml
index 27558283d74ff..e1499991c7a83 100644
--- a/.github/workflows/coding-standards.yml
+++ b/.github/workflows/coding-standards.yml
@@ -44,7 +44,7 @@ jobs:
   # Runs PHP coding standards checks.
   phpcs:
     name: PHP coding standards
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-coding-standards-php.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-coding-standards-php.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
@@ -54,14 +54,14 @@ jobs:
   # Runs the JavaScript coding standards checks.
   jshint:
     name: JavaScript coding standards
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-coding-standards-javascript.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-coding-standards-javascript.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -77,7 +77,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ phpcs, jshint, slack-notifications ]
diff --git a/.github/workflows/end-to-end-tests.yml b/.github/workflows/end-to-end-tests.yml
index cf90d34402106..8a017f1b16d3c 100644
--- a/.github/workflows/end-to-end-tests.yml
+++ b/.github/workflows/end-to-end-tests.yml
@@ -32,7 +32,7 @@ jobs:
   # Runs the end-to-end test suite.
   e2e-tests:
     name: Test with SCRIPT_DEBUG ${{ matrix.LOCAL_SCRIPT_DEBUG && 'enabled' || 'disabled' }}
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-end-to-end-tests.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-end-to-end-tests.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
@@ -48,7 +48,7 @@ jobs:
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -64,7 +64,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ e2e-tests ]
diff --git a/.github/workflows/javascript-tests.yml b/.github/workflows/javascript-tests.yml
index e38485e128262..5f74f10dfe18e 100644
--- a/.github/workflows/javascript-tests.yml
+++ b/.github/workflows/javascript-tests.yml
@@ -42,14 +42,14 @@ jobs:
   # Runs the QUnit tests for WordPress.
   test-js:
     name: QUnit Tests
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-javascript-tests.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-javascript-tests.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -65,7 +65,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ test-js, slack-notifications ]
diff --git a/.github/workflows/php-compatibility.yml b/.github/workflows/php-compatibility.yml
index b4e39508f6216..f6f9f3bec1b95 100644
--- a/.github/workflows/php-compatibility.yml
+++ b/.github/workflows/php-compatibility.yml
@@ -38,7 +38,7 @@ jobs:
   # Runs PHP compatibility testing.
   php-compatibility:
     name: Check PHP compatibility
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-php-compatibility.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-php-compatibility.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
@@ -47,7 +47,7 @@ jobs:
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -63,7 +63,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ php-compatibility, slack-notifications ]
diff --git a/.github/workflows/phpunit-tests.yml b/.github/workflows/phpunit-tests.yml
index 8666dcf5c2a09..1f8ad6095fb1d 100644
--- a/.github/workflows/phpunit-tests.yml
+++ b/.github/workflows/phpunit-tests.yml
@@ -33,7 +33,7 @@ jobs:
   #
   test-php:
     name: PHP ${{ matrix.php }}
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-phpunit-tests-v3.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-phpunit-tests-v3.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     secrets: inherit
@@ -41,7 +41,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-latest ]
+        os: [ ubuntu-26.04 ]
         # Test highest and lowest supported version of each major.
         php: [ '7.0', '7.4', '8.0', '8.2' ]
         db-type: [ 'mysql' ]
@@ -51,20 +51,20 @@ jobs:
 
         include:
           # Include jobs for PHP 7.4 with memcached.
-          - os: ubuntu-latest
+          - os: ubuntu-26.04
             php: '7.4'
             db-type: 'mysql'
             db-version: '5.7'
             multisite: false
             memcached: true
-          - os: ubuntu-latest
+          - os: ubuntu-26.04
             php: '7.4'
             db-type: 'mysql'
             db-version: '5.7'
             multisite: true
             memcached: true
           # Report the results of the PHP 7.4 without memcached job.
-          - os: ubuntu-latest
+          - os: ubuntu-26.04
             php: '7.4'
             db-type: 'mysql'
             db-version: '5.7'
@@ -83,7 +83,7 @@ jobs:
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -99,7 +99,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ test-php, slack-notifications ]
diff --git a/.github/workflows/test-build-processes.yml b/.github/workflows/test-build-processes.yml
index 1ff05f1b93468..3bcc4ecdf6509 100644
--- a/.github/workflows/test-build-processes.yml
+++ b/.github/workflows/test-build-processes.yml
@@ -38,18 +38,18 @@ jobs:
   # Tests the WordPress Core build process on multiple operating systems.
   test-core-build-process:
     name: Core running from ${{ matrix.directory }}
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-test-core-build-process.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-test-core-build-process.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-latest, windows-latest ]
+        os: [ ubuntu-26.04, windows-latest ]
         directory: [ 'src', 'build' ]
         include:
           # Only prepare artifacts once.
-          - os: ubuntu-latest
+          - os: ubuntu-26.04
             directory: 'build'
             save-build: true
             prepare-playground: ${{ github.event_name == 'pull_request' && true || '' }}
@@ -71,7 +71,7 @@ jobs:
   # See https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability.
   test-core-build-process-macos:
     name: Core running from ${{ matrix.directory }}
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-test-core-build-process.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-test-core-build-process.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' }}
@@ -87,7 +87,7 @@ jobs:
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -103,7 +103,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ slack-notifications ]
diff --git a/.github/workflows/welcome-new-contributors.yml b/.github/workflows/welcome-new-contributors.yml
index 048fb787fa50d..b4270679fa9fe 100644
--- a/.github/workflows/welcome-new-contributors.yml
+++ b/.github/workflows/welcome-new-contributors.yml
@@ -11,7 +11,7 @@ permissions: {}
 jobs:
   # Comments on a pull request when the author is a new contributor.
   post-welcome-message:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       issues: write
     timeout-minutes: 5