Theresa May’s new government is preparing the ground for a fresh crackdown on immigration amid concerns that universities have become an easy route into Britain for migrants who want to work.

The Prime Minister has backed calls to restrict student visas so that only the brightest and best can come to study at reputable universities in Britain.

As Home Secretary she took action to close down “bogus” colleges and to limit visas for students coming to study some further education courses.

But Mrs May’s team believe further restrictions on international students could significantly help to reduce net migration.