Answers

1. Lord Salisbury (1895-1902).

2. Herbert Asquith (Lloyd George only ever headed coalitions).

3. Ramsey Macdonald.

4. Sir Alec Douglas-Home.

5. Lord Home of the Hirsel, same chap as above - renounced his peerage to enter the House of Commons.

6. Five; Ramsey Macdonald, Clement Attlee, Harold Wilson, Jim Callaghan and Tony Blair.

7. Stanley Baldwin.

8. Illness.

9. Margaret Thatcher.

10. Ted Heath