There have been violent scenes as tens of thousands of people protested against plans to treble tuition fees and cut university funding in England.
Demonstrators stormed a building in Westminster housing the Conservative Party head quarters, smashed windows and got on to the roof.
Outside, a crowd of thousands surged as placards and banners were set on fire and missiles were thrown.
Student leaders condemned the violence as “despicable”.
They say about 50,000 people took part in a march through Westminster earlier.