BOXING legend Mike Tyson says Britain should legalise cannabis to help ease the growing prescription pill crisis. Pot entrepreneur Tyson, who owns a huge weed farm in California, says fully relaxed regulations would help ease the UK's spiralling mental health problem. The former boxing world champ, who once boasted of smoking £33,000 of cannabis every month, called it a 'wonder drug'. He told The Sun exclusively: "Well I will tell you, once it is legalised…