As deputy chairman of the Prison Commission for England and Wales from 1950 to 1952, he advised against a reprieve for Timothy Evans, hanged in 1950 for the murder of his baby daughter at 10 Rillington Place, London. He also thought that Evans was guilty of the murder of his wife, for which Evans had not been prosecuted. Evans was pardoned in 1966 and Evans' neighbour, John Christie, was held responsible for strangling his own wife and five other women as well as Evans' wife, to which he confessed. When the Home Office files were published, Allen expressed his deep regret at the advice he had given.[2]
Derek Bentley
Together with Permanent Under-Secretary Sir Frank Newsam, Allen unsuccessfully urged a reprieve for Derek Bentley, who was hanged aged 19 in 1953 for the murder of a policeman. Bentley, who was already under arrest at the time, had allegedly called to an armed accomplice, Christopher Craig, "Let him have it, Chris!", when they were caught in a burglary. The remark, if made, was ambiguous, possibly urging surrender of Craig's gun, rather than inciting Craig to murder. In 1998, Bentley received a posthumous pardon. Craig was imprisoned, being under-age for execution, and was later released.
In 1975, under the provisions of the Referendum Act, he oversaw as "Chief Counting Officer" for the European Communities membership referendum on 5 June, the first referendum ever to be held across the United Kingdom and saw voters approve continued membership by 67% of voters to 32% on a national turnout of 64%.
He was chairman of the council of Royal Holloway College during its merger with Bedford College in 1985.
Coat of arms of Philip Allen, Baron Allen of Abbeydale
Crest
Within a wreath of holly Proper a boar's head erased behind the ears Argent holding in the jaws a dice Gold.
Escutcheon
Barry of twelve Azure and Argent two swords in saltire points in base Proper hilts pommels and quillons Or surmounted by a representation of the tower of Beauchief Abbey Proper.
Supporters
On either side a tricolour cavalier King Charles spaniel the compartment comprising a grassy mount growing therefrom sprigs of holly all Proper.