And a five-point action plan has been set up which includes proactive monitoring of visits from extremists with the co-operation of the CST and the Union of Jewish Students.

In addition, vice-chancellors will be warned about the track record of extremists and there will be increased pressure on ministers to tackle extremism while working closely with the Grant Inquiry into campus radicalisation.

Guidance on the limits of free speech is currently being developed by the board and the CST.

The strategy has been developed by the board's vice-president Jonathan Arkush.

His daughter is at Manchester University - where matters have become tense for students.

Last month Israel's deputy ambassador, Talya Lador-Fresher, was forced to pull out of a talk after her security staff decided it was not safe to attend.

And its Student Union held a Palestine Week last month.

Speakers included Azzam Tamimi, who has said that he longed to be a "martyr".