The former chancellor Kenneth Clarke helps unravel the most delicate and fraught relationship in British politics. From Disraeli and Gladstone to Thatcher and Howe and Brown and Blair, the partnership beween a prime minister and his chancellor has been crucial to the success or failure of Government. In the first of these two programmes, Kenneth Clarke speaks to another former chancellor, Nigel Lawson , about his insights into being Him Next Door. Producer Mark Palmer