Alamy Stock photography Library http://www.alamy.com/
PhotographersDirect http://www.photographersdirect.com/
Royal Photographic Society http://www.rps.org/
Digital Imaging Group of the RPS http://www.digit.org.uk/rps/rps.asp
London Salon of Photography http://www.londonsalon.org/
BIPP British Institute of Professional Photography http://www. hipp.com/
Photographic Society of America http://www.psa-photo.org/
Brighton and Hove Camera Club http://www.bhcc-online.co.uk/index.html