I've just put a Tonk - Champagne against Jane, the girl who started the whole Aby - Ruddy/ASH Cream & White query, and gotten a purdy little Champagne kitten. The Ruddy thread proves Jane to be hiding Ruddy under her Cream & White, so Tonk - Champagne is dominant to Cream & White - now we just need that placing accurately to narrow this fur down some more.
A copy of the pedigree has been sent to Saga.
Abi.