Help. Obtaining a UK Gliding License on the basis of my AmericanLicense

Any of you folks from across the Pond care to help out?

I'm finding myself spending more time in the UK lately, including
weekends. I've flown with a number of different gliding clubs and
thoroughly enjoyed myself... so much so that I'm looking in to what it
would take to obtain a UK Gliding License. I contacted the BGA, but
I was basically told to poke around the BGA Website to find the
forms. Well, after 15 mintues of rooting around trying to figure out
what applies and what doesn't in my situation, I've given up.

Can anyone simplify this for me? Can I simply convert my US ratings
(commercial glider with flight instructor, 2,000 hours, 1,000K
diplome, etc.) to a UK license or do I need to start from scratch?

Any help appreciated.

Erik Mann (LS8-18 P3)