diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 068510c56d..cc489e36c1 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -50,6 +50,7 @@ Changelog
  * Update autoprefixer configuration to better match browser support targets (Janneke Janssen)
  * Update React and related dependencies to latest versions (Janneke Janssen, Hugo van den Berg)
  * Remove Hallo editor `.richtext` CSS class in favour of more explicit extension points (Thibaud Colas)
+ * Expose React-related dependencies as global variables for extension in the admin interface (Thibaud Colas)
  * Fix: Do not remove stopwords when generating slugs from non-ASCII titles, to avoid issues with incorrect word boundaries (Sævar Öfjörð Magnússon)
  * Fix: The PostgreSQL search backend now preserves ordering of the `QuerySet` when searching with `order_by_relevance=False` (Bertrand Bordage)
  * Fix: Using `modeladmin_register` as a decorator no longer replaces the decorated class with `None` (Tim Heap)
@@ -79,6 +80,8 @@ Changelog
  * Fix: Version comparison now handles custom primary keys on inline models correctly (LB (Ben Johnston))
  * Fix: Fixed error when inserting chooser panels into FieldRowPanel (Florent Osmont, Bertrand Bordage)
  * Fix: Reinstated missing error reporting on image upload (Matt Westcott)
+ * Fix: Only load Hallo CSS if Hallo is in use (Thibaud Colas)
+ * Fix: Prevent style leak of Wagtail panel icons in widgets using ``h2`` elements (THibaud Colas)
 
 
 1.13.1 (17.11.2017)
diff --git a/docs/advanced_topics/customisation/admin_templates.rst b/docs/advanced_topics/customisation/admin_templates.rst
index 4aff3f67c0..d2f4d70c8e 100644
--- a/docs/advanced_topics/customisation/admin_templates.rst
+++ b/docs/advanced_topics/customisation/admin_templates.rst
@@ -168,3 +168,25 @@ To completely customise the login form, override the ``login_form`` block. This
         <p>Some extra form content</p>
         {{ block.super }}
     {% endblock %}
+
+.. _extending_clientside_components:
+
+Extending client-side components
+================================
+
+Some of Wagtail’s admin interface is written as client-side JavaScript with `React <https://reactjs.org/>`_.
+In order to customise or extend those components, you may need to use React too, as well as other related libraries.
+To make this easier, Wagtail exposes its React-related dependencies as global variables within the admin. Here are the available packages:
+
+.. code-block:: javascript
+
+    // 'focus-trap-react'
+    window.FocusTrapReact;
+    // 'react'
+    window.React;
+    // 'react-dom'
+    window.ReactDOM;
+    // 'react-transition-group/CSSTransitionGroup'
+    window.CSSTransitionGroup;
+    // 'draft-js'
+    window.DraftJS;
diff --git a/docs/releases/2.0.rst b/docs/releases/2.0.rst
index da352130d4..8a8572318b 100644
--- a/docs/releases/2.0.rst
+++ b/docs/releases/2.0.rst
@@ -71,6 +71,7 @@ Other features
  * StreamField blocks now allow custom ``get_template`` methods for overriding templates in instances (Christopher Bledsoe)
  * Simplified edit handler API (Florent Osmont, Bertrand Bordage)
  * Made 'add/change/delete collection' permissions configurable from the group edit page (Matt Westcott)
+ * Expose React-related dependencies as global variables for extension in the admin interface (Thibaud Colas)
 
 
 Bug fixes
@@ -106,7 +107,8 @@ Bug fixes
  * Version comparison now handles custom primary keys on inline models correctly (LB (Ben Johnston))
  * Fixed error when inserting chooser panels into FieldRowPanel (Florent Osmont, Bertrand Bordage)
  * Reinstated missing error reporting on image upload (Matt Westcott)
-
+ * Only load Hallo CSS if Hallo is in use (Thibaud Colas)
+ * Prevent style leak of Wagtail panel icons in widgets using ``h2`` elements (Thibaud Colas)
 
 Upgrade considerations
 ======================