Il est un ancien professeur d'histoire à l'Université de Kingston[5],[6].
Liste non-exhaustive de ses ouvrages :
- Gladstone, Disraeli and Later Victorian Politics, Longman, 1970 (2e édition 1983, 3e 1997).
- The Rise of the Labour Party 1880-1945, Longman, 1972.
- The Decline of the Liberal Party, 1910-31, Longman, 1982 (ISBN 0582353270).
- Victorian radicalism: The middle-class experience 1830-1914, Longman, 1984 (ISBN 0582491975).
- British Politics in the 1930s and 1940s, Cambridge University Press, 1987 (ISBN 0521317290).
- Peel and the Conservative Party 1830-1850, Longman, 1989.
- Britain: Domestic Politics, 1939-64, Hodder Education, 1994 (ISBN 034059702X).
- Great Britain and the Irish Question 1798-1921, Hodder Education, 2005 (avec Robert Pearce).
