Should cannabis be legalised in the UK?

Thousands of people have gathered in London s Hyde Park to celebrate 420, the unofficial International Weed Day. The event is recognised by marijuana lovers all around the world to celebrate the use of the Class B drug while campaigners call for it to be legalised. Ian Collins: "The organiser said it s not just dirty hippies that smoke marijuana. It s older people, business people, academics. All sorts of people use cannabis in a responsible and active way".