Cannabis should be legalised and sold under licence in shops alongside tobacco and alcohol — that's according to Britain's leading expert on the drug.
Professor Roger Pertwee, of Aberdeen University, believes that legalising cannabis would help cut crime and costs to the NHS.
He said that if made under licence the drug would be free of contaminants and those who wanted to buy it should also have to apply for a licence and be over 21.
"We have to have a car licence, we used to have a dog licence, so why not have a cannabis licence so you can only take it if it is medically safe to do so," Professor Pertwee told the British Science Festival in Birmingham.
"That would exclude some people who are have a risk of becoming schizophrenic."
The Professor, who has previously advised the Government on the drug, added: "We are allowed to take alcohol and smoke cigarettes and cannabis if it is handled properly is probably not going to be any more dangerous than that.
"I think that this could be the way forward but it might not work because it depends on a company coming forward and producing branded products.
"If you came up with a company that wanted to do that it would have to go through the same licensing process as a medicine and show it was safe.
"If it went through all these steps, I would be in favour of it."