What a curious tale.
Why SAS? I did not think there were any SAS units in UK in 1942, it was still a maverick, undisciplined rabble by late 1942 and didn't improve much afterwards. In Norway to do what, sabotage (two men?)? Why not SOE (trained intelligence operatives) rather than loud, aggressive door-kickers? Why not Kompanie Linge?
. If true it's a suicide mission from start to finish.
How did the Russians mistake Finland for Norway? Norway is much further. Were they drunk? Why insert them from Russia? Over hostile Finnish territory and Sweden? I have never heard of any collaboration efforts involving British commandos/SOE and the Soviets.
This sounds like a pub-story.
regards
Keith