In the past few years, you may have noticed a terrifyingly large breed of dog stalking the streets of Britain: the infamous XL Bully.

An offshoot of the American Pit Bull Terrier, it’s hard to miss an XL Bully when you pass one in the street. Often weighing more than nine stone (or 57 kg) and with males at least 20 inches tall at the shoulders, they are defined by the government as ‘heavily-muscled’, with a blocky head, and a physique ‘suggesting great strength and power for its size.