Not likely that the RSPCA will have chance to get out there, a rescue is co-ordinating removing all the rabbits from them now, but the rescue co-ordinating do seem to be quite good, insisting they only go to rescues that homecheck, vaccinate and neuter and they are arranging for transport runs too.
It's not ideal to not have them prosecuted but at least these buns look like they are going to get out I guess. Besides the RSPCA would have to prove they have done it before and it's not illegal to breed buns so I suspect the only way the RSPCA could go is to say that she was fraudulently using their name.