It was no ordinary break-in. On June 20, under the cover of darkness, two activists entered what should have been one of Britain’s most secure military bases, RAF Brize Norton, and vandalised two Voyager planes.

One of the biggest mass arrests in modern British history threatens to clog the courts – but the Home Office is doubling down

Defending the group's proscription under terror law, she said the organisation was "not a non-violent organisation".