Sorry, Za, I can't answer your question.
But the 'Arctic Convoys' remain a controversial subject in this country to this day and are forever associated with the disaster of PQ17. As so often, the story is not told in the loss figures; the convoys are remembered mainly for the appalling conditions endured by the Merchant Seamen.
As an introduction, see ; -
http://www.naval-history.net/WW2Camp...ianConvoys.htm