should have posted this in 'buying and selling advice' although i'm sure a mod will sort this soon. but to answer your question if you are buying new all the suppliers in the banner at the top of the page can help you out. alternatively check the classifieds of this forum for people selling second hand gear across the UK who will happily post gear to you.
Best place to get your stuff from would be LIPS mate good guys who will give you honest good advice !!! pop along to the shop or give them a call mate 01707 325007 speak to john or chris http://www.lips-paintball.com/