The Dutch COM , Nederlandse Bond van Vogelliefhebbers issued a standard for the London Fancy last year.
You'll have to excuse the translation.
VLEUGELS/STAART 25 points , The vleugelpennen black without light ends. Wings well closed and regular. Staartpennen black, tail briefly, regularly and well closed.
CLARITY 20 points , Purify evenly of colour, both the melanine and
the lipochroomgedeelte.
COLOUR AND CAP 15 POINTS , The lipochroomkleur yolk have been only permitted, both intensively and mould. The melanine this way dark possible.
DEKVEREN VLEUGELPUNTEN 10 points , This way black possible.
LEGS, NAILS AND NOZZLE (beak) 10 POINTS , To plant rather short. Nozzle, legs and nails this way dark possible.
DONS 5 points , Must be in the possession of this way dark possible gemelaniseerd onderdons.
SIZE 5 points , 13cms maximum
CONDITION 10 points.
This is a literal translation but I will be getting an ehglish version of the standard at the World Show . The bird is shown in a Colour Canary box cage and a 2.9mm ring which I think is a size G.
Maybe Piet could tell us more as it is very interesting.
Regards Paul.