I don't really know Scholzie. There were few survivors to tell the tale. Wreckage was usually found all holed through, and there are some reports of concentraited fire on the lifeboats.
Well, we were on the allied side, for one, shipping tremendous amounts of food to the British, and then secondly, U-boats being spotted could be reported. That's all I can think off.
Just reading a book about the War years up here, tremendous stuff really. Seems to have been much more going on then I ever imagined.
That spy-part was also quite a thing. He may have had his fingers in luring the Scharnhorst out, it was a similar bait as supposed to get to the Tirpitz, but worked that time.
He was also assigned to making the Germans belive that the allied planned a seaborne invation from Iceland to Norway, by sending false reports of the Alled strength up here. Some belive that because of that, the Germans kept a bigger force in Norway than necessary. I don't really have any info about that, would be great if you had some.
BTW, there were quite a few Norse units here, including one squadron!