In April 1938, prior to the onset of the
Second World War, Gambier-Parry was recruited by Admiral
Sir Hugh Sinclair for the Secret Intelligence Service (SIS). Sinclair, previously the Director of British Naval Intelligence, had succeeded Sir
Mansfield Smith-Cumming as head of the SIS, also known as MI6. The Radio Section was established in 1938 upon Gambier-Parry's appointment; he was to oversee a thorough modernisation of the radio capability of the Secret Intelligence Service. The Radio Section was combined in late 1938 or early 1939 with the Codes (or
Cipher) Section to create the Communications Section, also referred to as Section VIII. As the head of Section VIII, Gambier-Parry, the Controller Special Communications (CSC), was charged with assembling a covert
wireless network that would connect the UK with their stations on the European Continent. He was promoted to Colonel in 1939. Whaddon Hall in
Whaddon, Buckinghamshire was the headquarters of Section VIII, the Communications Section of MI6. The radio station which was originally located in the tower of the mansion of
Bletchley Park (pictured), in
Bletchley,
Milton Keynes, Buckinghamshire, bore the name Station X. However, with a clearly visible aerial, it could not be kept secret. Instead, it was disassembled and relocated to Whaddon Hall. That facility served in a number of capacities, the most critical the sending of
Ultra intelligence from Bletchley Park to officers in the field. At the time that France fell to the
Axis powers in June 1940, only a small number of SIS agents were in communication with Whaddon Hall. Early in the war, until about 1941, inexperienced SIS agents on the European continent spent too much time on the air, and jeopardised their security. However, by 1943, Gambier-Parry and his staff had engineered a substantial improvement in clandestine wireless communication. Historian
Hugh Trevor-Roper served with the
Radio Security Service (part of the Secret Intelligence Service after May 1941) and could not help liking the head of Section VIII. "In the world of neurotic policemen and timid
placemen who rule the secret service, he moves like
Falstaff, or some figure from
Balzac, if not
Rabelais." ==Involvement in Operation Tracer==