He was wrong. On the document was an official stamp and British military intelligence had seen the same stamp and unit details being used by members of the SS who had been trying to flee.

Stakeknife operated as a prized agent for the British Army while a member of the IRA’s internal security unit during the 1980s The security service MI5 has discovered hundreds of new documents ...

However the CIA history doesn’t provide any detail on what kind of information was passed on to London, writes Greg Miller in the Washington Post The Royal Navy, RAF, and British Army benefited ...