British universities were already getting a lot of money from those international students — that's the whole point. The students now don't want to come to a country that doesn't want them (over 10% drop already), so if the universities don't want a huge hole in their finances, they now have to move the jobs off-shore to teach those students in another country. And those students will also spend their money on food, accommodation, etc. elsewhere. It's a big problem of Brexit for the higher-education sector, and for businesses in university towns. Expect to see degree costs for UK students also go up.