http://www.londonlua.org/
I emailed a bit with Justin from London Lua and he expressed interest in
having a Wikimedian present, either in person or remotely, about what
Wikimedia's going to be doing with Lua. There is already the video tutorial
https://commons.wikimedia.org/wiki/File:Berlin_Hackathon_2012_-_Lua_introdu…
and the written tutorial
https://www.mediawiki.org/wiki/Lua_scripting/Tutorial
in case you want materials to use. And if it would take a little money
for you to get to London, the Wikimedia Foundation might be able to
reimburse travel expenses:
https://meta.wikimedia.org/wiki/Participation:Support
--
Sumana Harihareswara
Engineering Community Manager
Wikimedia Foundation