Charlotte Head, 30, Samuel Corner, 24, Leona Kamio, 31, and Fatema Rajwani, 22, used sledgehammers and crowbars to destroy computers, drones and other equipment.

Charlotte Head, 30, Samuel Corner, 24, Leona Kamio, 31, and Fatema Rajwani, 22, used sledgehammers and crowbars to destroy computers, drones and other equipment.

The four activists, the first direct action protesters to be sentenced as terrorists, argue that their sentences are 'manifestly excessive'