They don't seem to have a website of their own but we did find this: The Fabric of Our Town, "put together by Bexley Local Studies and Archive Centre, in partnership with Crayford Manor House Historical Society".
This section lists the memorials created by the subject on this page:
Crayford Manor House Historical Society
Creations i
Crayford Chartists
The One Bell Inn Public House. Crayford Chartists held their first meeting he...
Other Subjects
British Plaque Trust
A charity with: "The key objective of the British Plaque Trust (BPT) is to resurrect this national scheme {of English Heritage} which commemorates the lives and successes of notable figures by reco...
7 memorials
Greenwich Historical Society
From the Picture source: "The Greenwich Historical Society began life as the Greenwich Antiquarian Society in 1905, merging with the Lewisham Society in 1919 to become the Greenwich and Lewisham An...
1 memorial
Robert P. McCulloch
American entrepreneur from Missouri, best known for McCulloch chainsaws and for purchasing London Bridge, which he moved to Lake Havasu City, Arizona - one of the cities he founded. He purchased it...
2 memorials
Noor Inayat Khan Memorial Trust
Founded by Shrabani Basu who is the author of 'Spy Princess: The Life of Noor Inayat Khan'.
1 memorial
Arthur Haygarth
Cricketer. Born in Hastings, Sussex. He played for Sussex, the M.C.C. and Middlesex. After retiring as a player, he achieved fame as a writer and historian on cricket. Died in Pimlico.
1 memorial