diff --git a/editions/prerelease/tiddlers/Release 5.1.18.tid b/editions/prerelease/tiddlers/Release 5.1.18.tid
index cf01d2dd7..43bea3071 100644
--- a/editions/prerelease/tiddlers/Release 5.1.18.tid	
+++ b/editions/prerelease/tiddlers/Release 5.1.18.tid	
@@ -7,9 +7,30 @@ type: text/vnd.tiddlywiki
 
 //[[See GitHub for detailed change history of this release|https://github.com/Jermolene/TiddlyWiki5/compare/v5.1.17...v5.1.18]]//
 
+!! Major Improvements
+
+!!! Node.js HTTP Server
+
+The HTTP WebServer functionality has been significantly improved:
+
+* Adds ability to make a wiki that is read-only for anonymous users, but allows editing for users who log in
+* Adds support for serving static file attachments over HTTP
+* Adds support for multiple user credentials for basic authentication via a CSV file containing usernames/passwords
+* Hides UI features like the new tiddler button and the edit button when the user only has read-only access to the wiki
+* Adds support for serving over HTTPS as well as HTTP
+* Adds support for authentication via a trusted header, making it easier to integrate with corporate single sign on (and Windows authentication)
+* Adds support for more fine grained authorisation (ie granting/denying individual users read/write permission to resources)
+* Better debugging information
+* Experimental support for a new, plain HTML single tiddler per page view
+* Adds a simple level of [[CSRF protection|WebServer Parameter: csrf-disable]]
+* Deprecating the existing “-—server” command in favour of a new “—-listen” command using the new NamedCommandParameters support for named parameters that can be specified in any order
+* Refactoring routes as separate modules, making it easier to extend the server with new functionality
+
+See WebServer for more details, or [[see the changes on GitHub|https://github.com/Jermolene/TiddlyWiki5/pull/2679]].
+
 !! New and Improved Plugins
 
-* 
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/commit/acaa07a964a004759ddb8fb755484918b3322815]] new commenting plugin -- see $:/plugins/tiddlywiki/comments
 
 !! Translation Improvements
 
@@ -19,15 +40,22 @@ New and improved translations:
 
 !! Usability Improvements
 
-* 
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/commit/6b14969cf60bdcad16ac5978030bf1d929a712c6]] a warning for binary tiddlers in view mode
 
 !! Hackability Improvements
 
-* 
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/pull/3346]] new [[range Operator]] for generating ranges of numbers
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/pull/3360]] palette support for `<select>` element colouring
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/commit/bef3242075b6d962b7963b9c9c7042c39198fc8f]] new text editor operation ''save-selection'' -- see [[WidgetMessage: tm-edit-text-operation]]
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/commit/f54a0a11bce9e47542df32610fae489f4a1dba8c]] support for editor toolbar buttons to have action widgets
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/commit/2e51f08bef8656fdca83fff6163dc67cbaefa2d4]] support for rebasing headings at render time -- see [[tv-adjust-heading-level Variable]]
 
 !! Bug Fixes
 
-* 
+* [[Fixed|https://github.com/Jermolene/TiddlyWiki5/commit/35cbb127a3c21b7047517f1eeeff571a420b82ae]] problem with unwanted variable substitutions by restricting variable substitutions to macros defined with the ''define'' pragma
+* [[Fixed|https://github.com/Jermolene/TiddlyWiki5/commit/c72e4f01f1a3051e169593a217bffab8eec279f6]] problem with the 'excise' editor toolbar button not showing if the tiddler type is "text/vnd.tiddlywiki"
+* [[Fixed|https://github.com/Jermolene/TiddlyWiki5/commit/929b0c98330ad25aa4a32cd201274a6e89cd8902]] problem with generation of wifi QR codes
+* [[Fixed|https://github.com/Jermolene/TiddlyWiki5/pull/3334]] problem with using full screen on secondary windows
 
 !! Developer Bug Fixes and Improvements