Some of Britain's top universities have slid to the bottom of the pile under new official rankings which place greater weight on student satisfaction.

Under the new system universities are rated gold, silver or bronze based on measures including student experience, employment after university and dropout rate.

London School of Economics, the 25th best university in the world according to the Times Higher Education university rankings, received a bronze award.

University College London, the 15th best university in the world according to the same rankings, received a silver award, the same level as Wrexham Glyndwr and London Metropolitan University, which came second and third from the bottom in this year's Complete University Guide.

More than half of the Russell Group institutions that entered also missed out on the top rating, including Queen Mary University of London, which received a silver award, and Liverpool University, which received bronze status. Liverpool said it was "disappointed" with its award.

The Teaching Excellence Framework was introduced by universities minister Jo Johnson in 2015 amid Government concerns that universities were too focused on research at the expense of teaching. This is the first year that results have been published.