(Photograph) - In at Number Ten: Since 1945 ten prime ministers have come and nine gone, yet serious historical study of "the twilight years" has only recently been attempted by academics. Next week some of the fruits of that research will be aired at an anniversary conference: Britain 1945-95, organised by the Institute of Contemporary British History. On pages i-viii The THES carries shortened versions of some of the main contributions, including Peter Hennessy on the changing nature of the premiership, David Cannadine on the House of Lords, John Charmley in a further reassessment of Winston Churchill and Ben Pimlott on political biography.