The UK government censorship/surveillance program which is supposed to
prevent terrorism represses students and studies in UK universities.
You don't need to come anywhere near wishing to commit violence before
the program threatens you or blocks an event.
Now, for where I disagree with the article. Sad to say, student
anti-racism also aims in that direction. It is not backed by state
power, so it does not threaten individuals, but if it prevents events
from being held, that amounts to censorship.
The UK government, while imposing its law-backed censorship, is hardly
in a position to sincerely defend freedom of speech on campus.