For those that have studied it, those six months are a riotous comedy of plans, counter-plans, cancellations, ideas, withdrawal of ideas, not everyone being told ideas HAD been withdrawn, France and Britain identifying differnet locations and objectives for occupation etc. .....at any one time the occupation of any one of twelve various location in Norway was discussed, together with mining or NOT mining Norwegian waters etc. .....
However - as we all now know, the Government Code and Cypher School was located at Bletchley Park in 1939, and work on decryption of German coded traffic began on 15th August 1939, both starting from scratch on wartime traffic and using the work previously done through the 1930s by the Poles M.Rejewski, J.Rozycki, and H.Zygalski. They and the Polish Government had shared the work they'd done with both France and Britain in the early summer of 1939, though their work was rapidly becoming obsolete as the Germans were introducing a long series of improvments and changes to Enigma in the run-up to war, and after the start of the war there was the usual problem of changing daybooks and cypherbooks before major offensives etc.
By August, 1940, however, "Ultra" intelligence digests of decrypted German traffic were being supplied to the British government and General Staff, and starting then in increasing amounts to be of considerable use in the Battle of britain and preparations for Sealion....and the many uses Ultra provided during the rest of the war are increasingly wellknown.
However - and this is my query - a certain very limited (if increasing) amount of "Ultra" intelligence would have been available through the early part of the year; and an operation like the planning and mounting of the German Invasion (planned as a "peaceful" occupation too) of Norway required a HUGE amount of signals traffic circulating around. Yet unlike what's coming out now about almost every OTHER Allied operation in WWII there is NO hint as yet of Ultra intelligence giving any warning of the Norway Invasion.
IS this....
1/ really the case? Was it missed as it lay in the early days of decryption of Engima-encoded traffic at Bletchley Park?
2/ Just not been written-in yet? There aren't anywhere as many books on the Norway fiasco as other battles and campaigns, and certainly not many since 1974 when the role of "Ultra" began to be revealed and acknowledged;
3/ Just not revealed yet? Experts trying to write the history of Ultra, Bletchely Park and "Station X" have all acknowledged that a LOT of Ultra material was "lost" in the government filing system for many years, and huge sections that SHOULD be available are STILL lost in there!
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![Very Happy :D](./images/smilies/icon_biggrin.gif)
![Very Happy :D](./images/smilies/icon_biggrin.gif)
![Very Happy :D](./images/smilies/icon_biggrin.gif)
But does anyone KNOW if Ultra played ANY role in the run-up to, or the planning of, the Norway campaign?