Stephen de Mowbray (15 August 1925-4 October 2016) was a counterintelligence officer in Britain's Secret Intelligence Service who became convinced that the then head of MI5, Sir Roger Hollis, was a Soviet spy.
Stephen de Mowbray (15 August 1925-4 October 2016) was a counterintelligence officer in Britain's Secret Intelligence Service. The then head of MI5 was a Soviet spy. This counterintelligence officer in Britain's Secret Intelligence Service became convinced this. Sir Roger Hollis was MI5.