What IS an XL Bully? Government releases official definition amid warnings dog will be 'impossible to track' once ban comes into place because it is not a recognised breed

MailOnline looks at the key questions ahead of new rules coming into force on December 31 making it illegal to breed, sell, advertise, exchange, gift, rehome, abandon or allow XL Bully dogs to go stray.

Moment two stray 'XL bullies' prowl the street as they are seen jumping at woman's car and trying to attack another pet dog before police seize the animals

Dozens of XL Bully owners gather on seafront to walk their dogs unmuzzled for the last time before new restrictions come into force TODAY

XL Bully seized and two arrested after dog mauled a Chihuahua puppy to death in horror attack after escaping house

Dozens of XL Bully owners gather on seafront to walk their dogs unmuzzled for the last time before new restrictions come into force TODAY

Mark Duell: All their latest coverage - Page 7

No money would ever tempt me to kill my XL Bully': Furious dog owners blast government £200 'puppy scrappage scheme' to euthanise their pets - as charities face an impossible task to

XL Bully D-day looms: MPs warn 'ambiguity' over breed will leave police even more stretched over Christmas and expert warns of 'disaster' - as videos show officers and owners struggling to handle

Landowner offers XL Bully owners a 'lifeline' to walk their dogs without a lead or muzzles on private fields as ban comes into effect today

XL Bully seized and two arrested after dog mauled a Chihuahua puppy to death in horror attack after escaping house

Dogs on death row: Illegal XL Bullys will be put down from TODAY and owners face jail if they don't comply with new law - but 70,000 dogs could still be unregistered

Dozens of XL Bully owners gather on seafront to walk their dogs unmuzzled for the last time before new restrictions come into force TODAY