Dr Julian Lewis: Does the Home Secretary accept that it is just as unacceptable for violent extremists to be present at student demonstrations as it would be for provocative foreign preachers to be present in the country when they have threatened to burn the Koran?

[The Secretary of State for the Home Department (Mrs Theresa May): My hon. Friend has very cleverly linked two issues in his question, but he tempts me down a route that I do not think it appropriate to go down at this point.]