Hi Sophie, welcome to the area!
The Clapham NCT branch run a number of regular drop-in playgroups across the week (for members and non-members) that you might be interested in, as well as weekly Walks on the Common and a whole host of other events.
Check out our website for more details and we'll hope to see you and the little ones soon!
http://www.nct.org.uk/branches/clapham/ ... ler-groups