Cambridge University has come top of an international university rankings table, knocking Harvard off top spot.

The US university, which had topped the rankings by careers advice company QS since 2004, slips to second place.

The QS rankings assess university research quality, graduate employability, teaching commitment and international commitment.

The UK's University College London, Oxford and Imperial College are also in the top 10.

King's College London and Edinburgh University also appear in the top 25 institutions.

In total, 22 countries are represented in the Top 100 - up from 19 last year. Of those, 15 are Asian universities, lead by the University of Hong Kong at 23.