Then, in 1975, a change of government brought a change in policy and Prof Randell was invited to the Cabinet Office to discuss the first official release of information about the Allies' main codebreaking machine.
Mr. Prime Minister, first of all, would you be prepared to talk to your predecessors, Tony Blair and Gordon Brown, to get there agreements to release any documents if they are relevant to the paper search that the Cabinet Secretary will undergo?
The Lib Dem peer appeared to criticise the coalition cabinet's decision to veto orders from the Information Commissioner to release a document setting out the potential consequences of their NHS overhaul.