Doctors in the House of Commons are to lead a campaign to change the law banning the medicinal use of cannabis, as a new all-party parliamentary group (APPG) forms to campaign for the issue. Dan Poulter, a former health minister who still works part-time as a GP, said he had already signed up fellow Conservative Andrew Murrison, Labour’s Paul Williams, and Philippa Whitford of the Scottish National party – four of the Commons’ nine medical doctors. The development comes after Alfie Dingley, a six-year-old boy with epilepsy, pushed medical cannabis on to the political agenda by taking a 300,000 signature petition with him to No 10. He had been effectively treated with cannabis oil in the Netherlands, but was denied it at home in the UK.