This is a very active history group with a publishing fraction called Past Tense. Titles include The Mayor of Garratt - mock elections in 18th century South London, Down with the Fences! - battles for the commons in South London and Nine Things That Aren't There: a manoeuvre around the Elephant and Castle.
Good site with interesting information about the Bristol community of Easton's history. See their excellent list of slave revolts in the Atlantic and prepare to be astounded!