The issue focused on the main political parties' policy on the future of the UK's nuclear weapons. The political leaders of the three main parties have said that the country's security is at risk from a second world war. The event, on the last day of the conference, was at a time of deep political division. The issue of the future of the UK's nuclear weapons is a major part of the political debate. The main political parties, the Liberal Democrats, the Conservatives and the Labour Party, have all said