Watched this last night for the first time in a long while, absolutely amazing.
It really makes you think about how highly trained RAF pilots and crews are, in a blizzard with nil visibility and heavy wind, off the coast of Scotland near to mountainous terrain, when no other aircraft would fly, they are just flying along as normal, navigator sat there reading "Left heading 170", "Right heading 190" off the radar, everybody perfectly calm.
This is to take nothing from regular pilots who are themselves highly trained professionals, however many other pilots would have panicked or ended up in a smoldering wreck in those circumstances. It really does show the RAF pilots to be on another level completely.