There is a lot of interest in establishing a South London group and some potential organisers participated in the April session of the Reading Engine Shed to see how it all works. Richard Semmens of Streatham is embarking on an ambitious fundraiser in May 2018 in aid of the proposed South London Engine Shed group. This would be run independently but based on the same idea as the two other Engine Shed groups. Richard’s link is below and there are also some great images of The Engine Shed in Reading from his visit:
https://www.justgiving.com/crowdfunding/thamestrentwalk
Do support Richard if you would like to have such a facility in South London!