Some dogs are 'banned' and this is dependent upon what your dog looks like rather than its breed, name or its parents' breed. The law states that four kinds of dog are banned:
The police have the power to seize your dog if they believe it is a banned type. The maximum penalty for possessing a banned dog is £5,000 or six months' imprisonment - or both.
You must not own, breed from, sell, give away or abandon any banned dog.