Pax,
Did the Swedes provide any intercepted Enigma Messages with the UK during the early years of the War?
Their Intelligence Service had broken the German Codes by 1940 due primarily to the work of Arne Buerling.
His work was simply amazing....as he did it using his genius math skills and some pencil and paper work.
I have read that Bletchley was reading German Air Force Codes in mid-1940.