I think the standard forums would probably suffice for any bp-specific questions you have. but you might also have to spend some time figuring out which members are from the UK. I know dr. del (an admin) is located in scotland and has a tendency to give solid advice if you are looking for particular resources available in britain.
regarding breeders, most of the prominent businesses here are well equipped to ship abroad with CITES papers. you might also check out Justin Kobylka's website as I'm pretty certain he has partnered with a UK breeder on some projects over the last year.