Canon UK For Canon cameras, lenses, printers, etc.
I still use Lee Filters, they're so good and easy to use.
Gitzo Carbon Fibre tripods.
Wimberley Side-kick gimbal head for wildlife photography.
Lowepro camera bags and pouches
Amazing Internet is a leading provider of websites for photographers, artists and musicians.
Outdoor Writers and Photographers Guild
Supplier of 'L brackets', very useful kit!