London Parks & Gardens Trust
- An independent charitable trust whose objective is to promote education about historic parks and gardens in London and to seek to conserve, enhance and recreate these gardens for the education and enjoyment of the public.
- http://www.londongardenstrust.org/

London Tourist Board
- London tourism information from accommodation to museums and art galleries, shows and eating out, sightseeing attractions and shopping, exhibitions and corporate events.
- http://www.visitlondon.com