Here are some links to other groups of interest:
Mitcham Common Conservators
Mitcham Cricket Green Community and Heritage
http://mitchamcricketgreen.org.uk
Wandle Valley Regional Park
http://www.wandlevalleypark.co.uk
Wandle Valley Forum
http://www.wandlevalleyforum.org.uk
Beddington Farmlands
http://beddingtonfarmlands.org.uk
Stop the Incinerator
http://www.stoptheincinerator.co.uk
Merton Council
http://www.merton.gov.uk/index.htm
Merton Borough Walk4Life
http://www.merton.gov.uk/transport-streets/roads-highways-pavements/roadsafety/walk4life.htm
Friends of Streatham Common
http://streathamcommon.org/links/
Friends of Clapham Common
Friends of Tooting Common