The former Beatle said it was finally time to give up smoking the drug due to a “sense of responsibility” in caring for his daughter.

“I smoked my share. When you’re bringing up a youngster, your sense of responsibility does kick in, if you’re lucky, at some point,” he said in an interview with Rolling Stone magazine. “Enough’s enough – you just don’t seem to think it’s necessary.”

In the magazine interview Sir Paul admitted to smoking cannabis "a lot" and has previously declared a passion for "wacky baccy". Heather Mills, the mother of Beatrice, claimed Sir Paul smoked marijuana as often as most people drink cups of tea during the couple's divorce proceedings.

"You get the argument 'Make way for the young kids,' " he says. "And you think, 'Fuck that, let them make way for themselves. If they're better than me, they'll beat me.' Foo Fighters don't have a problem, they're good. They'll do their thing."