Not sure if I can trust this blog, looking at another article linked from that one:
Palestine Action was a legal organisation.
Nearly a year later, the government of Keir Starmer declared it a
terrorist group – the first time in British history that a non-violent
direct action organisation has been proscribed.
AFAIK, they rammed their van through a front shutter, without knowing who might be on the other side; and as police tried to arrest them, one of them hit a female police officer in the back/spine with a sledgehammer.
Doesn't sound non-violent to me..