The Security Service used a convicted trickster to monitor a Canadian engineer, a move that ended in a German interrogation and the total collapse of a high-stakes double agent operation.
By Constance Bell ·
A Portuguese national’s recruitment to spy on British war production began with a betrayal of his father’s employer and ended in a Security Service file kept secret for decades.
By Vera Kessler ·
A merchant seaman’s vague past and a manufactured Comintern identity allowed the Security Service to run a three-year surveillance loop against Japanese intelligence.
By Harlan Pryce ·