Slightly at a tangent but here are some photos one of the group members posted from last Wednesday evening. (Thanks Conall)
If you have a mailing list you can forward links like this to all the other group members which is very useful.

http://flic.kr/p/cjdcJN

http://flic.kr/p/cjcZNW

http://flic.kr/p/cjcDsE

http://flic.kr/p/cjc1wQ