University threatened with legal action after protest at academic's talk

She alleged that her freedom of speech was restricted in a number of ways, including:

The number of attendees being restricted to 60 staff, postgraduate students and members of the public

Undergraduate students being prohibited from attending

Limited advertising being provided for the event

A venue for the event being chosen which was vulnerable to protests

Reasonable steps not being taken to prevent the talk being disrupted

Prof Sullivan told the BBC it was like a "zombie apocalypse" as some protesters pressed up against the window with placards and loudhailers.

https://www.bbc.co.uk/news/articles/cwyx3y84ln9o