Erik,

if your friend enjoys pheasant shooting in Scotland why doesn't he consider direct links? Unless he needs to travel by scheduled airlines, smaller carriers like City Star Airlines do direct links from Oslo to Aberdeen, probably much quicker than going to Heathrow and much less red tape. Get him to do an internet search on carriers.

I am not recommending City Star, I know nothing about them but they popped up during a quick search. Might be worth investing an hour looking for Scottish airports like Prestwick, Glasgow or Aberdeen.