Oxford University has come top of the Times Higher Education world university rankings - a first for a UK university.
Oxford knocks California Institute of Technology, the top performer for the past five years, into second place.
But there are warnings the vote to leave the European Union could destabilise UK higher education and hinder work with academics abroad.
The rankings show a mixed picture for European universities, while Asian institutions continue to rise.
The Times Higher tables rank universities worldwide on measures including…