By the war's end in Europe in May 1945, the Testery had grown to nine cryptanalysts, a team of 24 ATS, a total staff of 118, organised in three shifts working round the clock.
Tunny was the cipher system which carried only the highest grade of intelligence: messages from the German Army Headquarters in Berlin and the top generals and field marshals on all fronts.
Tens of thousands of Tunny messages were intercepted by the British and broken at Bletchley Park by Captain Roberts and his fellow codebreakers in the Testery.
The information provided by Tunny enabled the Allies to ascertain German movements, saving thousands of lives at critical junctures such as D-Day and the Battle of Kursk in the Soviet Union.
For the first time, on 25 October 2011, a BBC Timewatch programme titled Code-breakers: Bletchley Park’s Lost Heroes, about the Testery, Tunny, Bill Tutte and Tommy Flowers, was produced, featuring testimony from Jerry Roberts.
[3] By the war's end in Europe in May 1945, the Testery had grown to nine cryptanalysts, a team of 24 ATS, a total staff of 118, organised in three shifts working round the clock.