Saving Old Seagulls

I am looking for information on decals (photos, dimensions) for BMB Ensign, pre-war Britannia'33 and '36?, immediate post war Britannia and Britannia Mariner inboard. Also looking for decal for Saunders Roe Medina outboard and decal for Ferrier as previous post. Always looking for BMB spares/bits ...

I am restoring a 1950 Ferrier 120, the model with the wrap-around steel tank.
Does any know what colours the tank and decal should be?
I have heard that the later ones had a red glassfibre cowl (in the early 1950's?).
The models with the cylindrical tank had a black tank and red and black decal ...