diff --git a/CHANGES.rst b/CHANGES.rst
index a7ed49e105..0bcd5a7177 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -8,6 +8,97 @@ This release also begins the process of renaming a number of the metrics
 reported to prometheus. See `docs/metrics-howto.rst <docs/metrics-howto.rst#block-and-response-metrics-renamed-for-0-27-0>`_.
 
 
+Changes in synapse v0.27.0-rc1 (2018-03-14)
+===========================================
+
+Features:
+ * Add support for a remote media repository backed by S3 (PR 2867, 2777, 2783, 2789, 2791, 2804, 2812,2814, 2857, 2868, 2767)
+ * Add shiney new purge API. New implementation is:-
+  * Faster 
+  * Supports clearing by timestamp
+  * Supports deleting of local events
+  * Is transactional 
+(PR #2858,2867,2882, 2946,2962,2943)
+
+ * Let homeservers specify a whitelist for the format of 3PIDs that users are allowed to register with or add to their HS accounts. (PR #2813)
+ * Add /room/{id}/event/{id} to synapse (PR #2766)
+ * Add an admin route to get all the media in a room (PR #2818) Thanks to @turt2live!
+ * Add federation_domain_whitelist option (PR #2820,2821)
+
+
+Changes:
+
+ * Major refactor to move computation out of the main process and into a series of worker processes with a view to taking advantage of multicore machines. New workers are:-
+   * Event Creation
+   * Push Actions
+
+With more to follow
+
+ (PR #2892, #2893, #2894, #2896, #2897, #2898, #2899, #2900, #2901, #2902, #2903, #2904, #2913, #2920, #2921, #2922, #2923, #2924, #2925, #2926, #2947, #2847, #2854, #2872, #2873, #2874, #2928, #2929, #2934, #2856)
+
+ * Use StateResolutionHandler to resolve state in persist_events (PR #2864, #2871, #2802, #2835, #2836, #2841, #2842, #2849)
+ * Adapt the default config to bind on both IPv4 and IPv6 on all platforms (PR #2435) Thanks to @silkeh!
+ * Allow use of higher versions of saml2 (PR #2695) Thanks to @okurz!
+ * Better logging when login can't find a 3pid (PR #2744)
+ * add ?ts massaging for ASes (PR #2754)
+ * Remove 'verbosity'/'log_file' from generated cfg (PR #2755)
+ * Make indentation of generated log config consistent (PR #2762)
+ * Remove dead code related to default thumbnails (PR #2764)
+ * Update http request metrics before calling servlet (PR #2770)
+ * Do bcrypt hashing in a background thread (PR #2773)
+ * When using synctl with workers, don't start the main synapse automatically (PR #2774)
+ * Make Counter render floats (PR #2778)
+ * Store state groups separately from events (PR #2784)
+ * Reorganise request and block metrics (PR #2785)
+ * Metrics for number of RDATA commands received (PR #2786)
+ * Metrics for events processed in appservice and fed sender (PR #2787)
+ * Optimise LoggingContext creation and copying (PR #2792)
+ * Track db txn time in millisecs (PR #2793)
+ * Track DB scheduling delay per-request (PR #2794, #2795)
+ * Sanity checking for user ids (PR #2797)
+ * better exception logging in callbackmetrics (PR #2809)
+ * Fix bugs in block metrics (PR #2810)
+ * Add some comments about the reactor tick time metric (PR #2816)
+ * Use a connection pool for the SimpleHttpClient (PR #2817)
+ * Remove unused/bitrotted MemoryDataStore (PR #2828)
+ * Make it possible to run tests against postgres (PR #2829)
+ * Factor out get_db_conn to HomeServer base class (PR #2830)
+ * Logging and metrics for the http pusher (PR #2833)
+ * Improve exception handling in persist_event (PR #2834)
+ * montoring metrics for number of cache evictions (PR #2844)
+ * Update pynacl dependency to 1.2.1 or higher (PR #2888) Thanks to @bachp!
+ * Remove ability for AS users to call /events and /sync (PR #2948)
+ * use bcrypt.checkpw (PR #2949) Thanks to @krombel!
+ * Factor run_in_background out from preserve_fn (PR #2961)
+ * Add a metric which increments when a request is received (PR #2965)
+ * Improve caching for read_marker API (PR #2927)
+ 
+
+Synapse 0.27.0 begins the process of rationalising metric names. To enable a graceful migration path, this release just adds new names for the metrics being renamed. A future release will remove the old ones. For more info see [here](https://github.com/matrix-org/synapse/blob/develop/docs/metrics-howto.rst#block-and-response-metrics-renamed-for-0270)
+
+
+
+Bug fixes:
+
+ * synapse/config/password_auth_providers: Fixed bracket typo (PR #2683) Thanks to @seckrv!
+ * Check missing fields in event_from_pdu_json (PR #2745)
+ * Fix templating error with unban permission message (PR #2761) Thanks to @turt2live!
+ * Fix flaky test_rooms UTs (PR #2765)
+ * Fix publicised groups GET API (singular) over federation (PR #2772)
+ * Fix a logcontext leak in persist_events (PR #2790)
+ * Fix 'NoneType' object has no attribute 'writeHeaders' (PR #2796)
+ * fix SQL when searching all users (PR #2803)
+ * Fix server 500 on public rooms call when no rooms exist (PR #2827)
+ * Fix SQL for user search (PR #2831)
+ * Fix sql error in quarantine_media (PR #2837)
+ * Handle url_previews with no content-type (PR #2845)
+ * Add missing yield during 3pid signature checks (PR #2933)
+ * Fix race in sync when joining room (PR #2944)
+ * Fix slow event search, switch back from GIST to GIN indexes (PR #2769, #2848)
+ * Fix scary-looking dns resolution errors (PR #2838)
+
+
+
 Changes in synapse v0.26.0 (2018-01-05)
 =======================================