The home secretary is planning to proscribe the Palestine Action group, effectively branding it as a terrorist organisation, Sky News understands.
Yvette Cooper is preparing a written ministerial statement which would make becoming a member of the group illegal.
The statement is expected on Monday and will then need to be enacted through new legislation.
It comes after pro-Palestinian activists targeted RAF Brize Norton and damaged two military aircraft – with Sir Keir Starmer describing their actions as “disgraceful”.
A security review has now been launched after the breach.
Brize Norton, in Oxfordshire, is the largest RAF station with approximately 5,800 service personnel, 300 civilian staff and 1,200 contractors.
In a video shared by Palestine Action on Friday morning, a person can be seen approaching an aircraft on a scooter as music is played. The person then sprays paint into one of the plane’s engines. Red paint can be seen on the ground.
Repurposed fire extinguishers were used to spray the paint into the turbine engines of two Airbus Voyagers, while further damage was made using crowbars.
The organisation – which focuses its campaigns on multinational arms dealers and has previously targeted corporate banks – said it had damaged two military planes at the base, where flights depart on a daily basis for RAF Akrotiri in Cyprus.
A second photograph purports to show the back of one of the engines covered in paint
The group said two activists “broke into the largest air force base in Britain and used electric scooters to swiftly manoeuvre towards the planes”.
They said they did so because “despite publicly condemning the Israeli government, Britain continues to send military cargo, fly spy planes over Gaza and refuel US/Israeli fighter…
