The Great Britain goldfish standards were developed at the turn of the century, and have been modified several times since then.  The most recent modification occurred in 1995, with the goldfish standards being adopted nationally.  Copies can be obtained by visiting one of the Great Britain goldfish sites, including:  The Bristol Aquarist Society, the Association of Midland Goldfish Keepers, the Goldfish Society of Great Britain, and the Northern Goldfish and Pondkeepers Society.  Due to the various copyright restrictions, I cannot provide a copy of the current standards on the website. 

The standards shown here are from the 1960s, which of course, are fairly outdated.  John Parker, the renowned goldfish judge from the U.K. has been kind enough to provide a description of the judging methods in place currently, which I quote below.

In the UK the fish are usually exhibited in plastic tanks measuring 14 inches x 10 inches by 8 inches deep although slightly larger tanks are provided at some shows for breeders’ team classes. They are provided by the Society organising the show and are usually filled with water on the evening before the day of the show. All shows are “one day events”. Classes are provided for adults/open, breeders’ teams and single entry breeders. Entries in the adult/open classes can be of any age and do not have to have been bred by the exhibitor but those in the breeders’ classes have to have been bred by the exhibitor in the current calendar year. Each tank contains one fish, apart from those for breeders’ team classes which will contain 4 baby fish. The tanks are arranged in class order with all the tanks containing fish in each class being grouped together making life easier for the judges and making comparison between exhibits possible.