UK universities did their own student exodus move with brexit, I'm still friends with several professors of Russel group universities and they all say the same thing - after Brexit the number of MSc and PhD level students have collapsed and not recovered anywhere since. UK is in for a very rude awakening in a few years where its position as a superpower in research starts to dwindle. And to add on top of it - the universities are now cramming as many international(non-EU) students as possible, because they pay ridiculous fees that support school coffers - lecturers are more or less directly told they are not allowed to fail those students in any way almost no matter the transgression because they are the main source of income for universities.