Manningham-Buller was elected to the
House of Commons in a 1943 by-election as member of parliament (MP) for
Daventry. and was
knighted; in 1954 he was sworn into the
Privy Council and became the
Attorney General for England and Wales. In 1956 he succeeded his father in his
baronetcy. Devlin also criticised Manningham-Buller for his uncharacteristic weakness at a crucial moment in the Morrell case: evidence (some nurses' notebooks) that had gone missing from the
Director of Public Prosecutions's files, turned up in the hands of the defence on the second day of the trial. Manningham-Buller claimed he had not seen them before but failed to halt their admission as evidence, or ask for time to acquaint himself with their contents. They were subsequently used by the defence to throw doubt on the accuracy of the testimony of various nurses who had worked with Adams and who had questioned his methods and intentions. This damaged the prosecution tremendously, fatally scuppering the case. Manningham-Buller's handling of the case later provoked questions in the
House of Commons. Indeed, on 8 November 1956, Manningham-Buller himself had handed a copy of Hannam's 187-page report to the President of the
British Medical Association (BMA), effectively the doctors' trade union in Britain. This document – the prosecution's most valuable document – was in the hands of the defence, a situation that led the
Home Secretary,
Gwilym Lloyd-George, to reprimand Manningham-Buller, stating that such documents should not even be shown to "
Parliament or to individual Members". "I can only hope that no harm will result" since "the disclosure of this document is likely to cause me considerable embarrassment". == Lord chancellorship ==