Hey, I hope this is OK to post here but there is a group that meets about once a month in London called the Humanist Association of London and Area. It's a group for atheists, they always have a speaker and discussion time. I have only got to one meeting so far but it was pretty interesting. Just wanted to get the word out to anyone who was interested. Here is a link to the meeting info http://www.humanists-london.org/Meetings.html

I know it's super short notice cause this one starts in an hour but if you check the website I think they will post next months meeting when they work out a time