1. J.W. Young, Britain and the World in the Twentieth Century (London, 1997), p. 224;
2. A. Sked and C. Cook, Post-War Britain: A Political History (London, 1993), pp. 265–6;
3. C. Hill and C. Lord, ‘The Foreign Policy of the Heath Government’, in The Heath Government, 1970–74: A Reappraisal, ed. S. Ball and A. Seldon (London, 1996), pp. 294–7;
4. D. Judd and P. Slinn, The Evolution of the Modern Commonwealth, 1902–80 (London, 1982), pp. 112–13, 118–19, 131–3;
5. D.R. Thorpe, Alec Douglas-Home (London, 1996), pp. 420–9;