Police were called to St James’s Square, SW1, at 04:07hrs on Monday, 20 May following a report of protestors scaling a building.
Officers attended and warned protestors that they were trespassing and were subject to arrest under section 69 of the Public Order Act. Ten people have been arrested for aggravated trespass and all remain in custody.
The final arrests were made at approximately 19:40hrs.
There are no protestors left at the scene although police maintain a presence at the location.
Road closures have been lifted.