Here is a small lists of UK Organisations
The Federation of Northern Aquarists societiesLooking after the welfare of the Northern aquatic clubs in England, including Open shows and breeders schemes
The Federation of British Aquarist SocietiesFounded in 1938, the Federation of British Aquatic Societies (FBAS) is the largest fishkeeping-orientated organisation in the UK and provides services for Societies including Show support,
The Federation of Scottish Aquarist Societies The Federation of Scottish Aquarist Societies consists of 13 Aquarist Societies throughout Scotland who hold regular meetings and yearly Open Shows
Sheaf Valley Aquarist Society A south Yorkshire-Nottingham club re-born, that has its own web site and forum