American XL bully dogs, the largest type of American bully, have been linked to multiple attacks in the UK, resulting in fatalities. Ownership laws vary: Scotland mandates registration by July 31, 2024, while England and Wales also have strict regulations. In 2022-23, over 9,200 hospital admissions were due to dog bites in England, marking a nearly 50% increase over a decade. Under the Dangerous Dogs Act 1991, new laws mandate insurance, microchipping, and secure housing for these dogs.