Police clash with student demonstrators as thousands march on Parliament Square and Tory party HQ to protest against tuition fees and graduate debt

Two people were arrested after protesters on a student demonstration charged the headquarters of the Tory party in central London. The pair, a man and a woman, were arrested at the scene for affray, officers there said. Thousands of students have been marching through central London in protest against tuition fees and debt. Three police officers have been injured.