In some venues? Non-existent.
Israel’s deputy ambassador to Britain was forced to flee from a university campus after protesters caused a lecture on the Middle East to be abandoned.
Alon Roth-Snir was speaking at Essex University in Colchester on Wednesday when 40 students disrupted the meeting.
The university’s student union has a series of anti-Israel policies in place and had actively campaigned against the invitation to Mr Roth-Snir to speak to the government department.
An Israeli embassy spokesman said: “These students make a mockery of the very foundations of freedom of speech, a pillar of the academic world. Their actions shame Essex University and British academia, and damage a long tradition of positive academic exchange.
“Such behaviour should be strongly condemned by all those who cherish democratic values.”