The regular one is Ackroyd Childrens Centre on ackroyd road 5 minutes from Honor Oak Station. They have a group every weds and fri - small charge but tea and coffee, run by really nice people, soft bit for small babies and bigger bit for toddlers. Netmums have a local group with meet ups at Jam Circus and crofton park library has baby song time on a friday morning. Hope that helps. s.