Archery GB is the governing body for targt archery in the UK. Membership is required by most clubs.
Archery Interchange UK is a great forum for all things archery related.
Suppliers
Quicks is one of the UKs leading suppliers of archery equipment and paraphernalia. They also offer a FREE 100 page A4 catalogue (great as a refernce tool).
Quality UK made recurve bows from former olympian. Also offer a hire service and other quality archery equipment.
A brilliant place for all traditional archery equipment and supplies.