Denis Barrett (fieldname Honore) arrived in north-eastern France by parachute in April 1943 and worked as the wireless operator for a clandestine circuit in the Troyes area. He was in regular contact with London until his cover was blown several months later and escaped to England after being extracted by Lysander aircraft from No.161 Special Duty Squadron RAF.
Barrett volunteered to undertake a second mission to France and arrived by parachute in early March 1944 and worked as the wireless operator for a new circuit called MINISTER located in Seine-et Marne, northern France. Barrett had two wireless sets; one was in Tores the other was hidden in the countryside several miles from the town. The Abwehr (German Military Intelligence) were aware of a British agent in contact with London and Barrett transmitted from several locations to avoid his safehouses being located by direction finders.
After an agent was captured whilst transmitting to London Barret stopped using his wireless located in Tores and for several months travelled by bicycle to the countryside to use his other wireless. During his journeys he avoided German patrols and, on several occasions, cycled past stationary wireless detection vans which were listening for signals.
Despite constantly changing his location to avoid detection London became aware there was a problem after his signal abruptly stopped in mid-sentence and Barrett was later reported missing presumed dead.
After the war Barret’s name was found scratched on the wall of a cell at the SD headquarters in Avenue Foch, Paris and it is known he was later moved to Buchenwald concentration camp. It was later reported he was among the first of thirty-one agents who were hanged at Buchenwald during the first week of September 1944, but it is now believed he was among the eleven agents shot at Buchenwald on 5 October that year.