At least in Germany you are allowed to make a copy for yourself as long as you don't circumvent some copy protection. However giving this copy away still would be illegal.
i think it's similar in the u.k. it's funny how the law allows a backup copy without messing with the copy protection. reducing the amount of backupable items to a negligible figure
Actually the point is that it's backup
copies. Which means that you just keep them and don't use, unless prime copy doesn't work. So at any given moment only one person can play a (license of) game. Or so the intention of the law is.
In my view (though it doesn't neccessary correct in legal terms) you can allow your friend to play a game as long as you don't play it yourself. That's what I see in "don't abuse the system", said by GOG.