Most of you are too young to remember the days when this was not the case. I certainly had to have a work permit to go and work in the UK in 1970. It was almost impossible to obtain in those days- I was VERY lucky I knew the right people, had the right contacts, etc - as the firm had to make the application for me and make a strong case for employing me, rather than a UK national. If the vote passes tomorrow in CH, and if BREXIT goes through- we may well revert to this scenario. No studying in each other's country and very restrictive work permit in exceptional cases.