CNN is just calling them "bull terriers", which isn't much help I think, but they showed photos of them, and not being a terrier spotter I can only say that they look like the dog owned by Bill Sykes in Oliver...Any help?

The corgi was killed about a week before the maid was bitten.

There is no law re two strikes and you are out, but the RSPCA, of which the Queen is the patron, has said that it is standard practice for dogs to be put to sleep after two attacks.