As the opinion polls indicate that-half the Scottish electorate now favours independence, David Dimbleby chairs a debate from Edinburgh on the future of Scotland's government. Taking part will be four men who will help decide it: the Rt Hon Ian Lang , the Secretary of State for Scotland; Donald Dewar , Labour's Scottish Spokesman; Alex Salmond , Leader of the Scottish National Party; and Malcolm Bruce of the Liberal Democrats. Each gives his answers to the question which will dominate the general election in Scotland.