Under the Dangerous Dogs Act 1991, it is an offence to advertise the sale, exchanging or gifting of one of the four types of dog where possession is prohibited except under strictly controlled conditions. The offence covers sales over the internet. Any assessment of the internet trade would not be practical as internet trading is worldwide, and in some countries, it is legal to advertise these dogs. An offence would be committed if a person living in this country bought a prohibited dog from an overseas trader and then brought it here.