Available in the Internet Archive, R.A.F. in Russia by Hubert Griffith 1942 https://archive.org/details/rafinrussiagriffith From Chapter 1 “A short, informed, but not-too-official record of the doings of No. 151 Wing, R.A.F. in North Russia may be of some interest to the general public…. To summarize the intended and the achieved activities of the Wing, then: - the Wing was formed in England in the last days of July, 1941, to go out to Russia for two purposes. First - and the most important - was to teach our new Allies how to fly, erect, and maintain Hurricane aircraft. England was in process of sending out some hundreds of Hurricanes as one of our early instalments of aid, and it was obvious that these would have been useless as a contribution unless they could be taken over on arrival by a very large body of trained Russian personnel - trained not only to fly them (a matter of only a few days instruction to crack pilots), but trained, as ground-staffs, to un-crate them, assemble them, take them to pieces again as the necessity arose, and in general, to " service " and overhaul them and all their wireless and technical equipment, with expert and practised skill. All aircraft and all aero-engines that take the sky obey the same general principles - but it was this specialized knowledge of a particular and complicated type that it was the Wing's first business to provide…. The second, more spectacular though less basic, part of the job of the Wing was to try, as far as adverse conditions allowed, to give an exhibition of the destructive qualities of the twelve-gun Hurricane in action - in other words, to shoot down Huns.” Maureen
If anyone is interested in the subject, ‘Hurricanes over Murmansk’ by John Golley is a good read. You can get the hardback second hand for less than £5, including postage.
I can't recommend Geoff Rabel's "The RAAF In Russia" high enough. Aircrew Book Review: The RAAF In Russia - Geoffrey W Raebel review by Andy Wright Regards, Dave