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.

Disrupting Israel’s largest weapons manufacturer Elbit Systems by trespassing on their sites in Britain is not terrorism,” she said.“It is the Israeli Defence Force and all those who arm and enable their war crimes who are the terrorists.

Officers made arrests after crowds, waving placards expressing support for the group, gathered in Parliament Square.