Big Ben is the nickname for the Great Bell of the Great Clock of Westminster and for the clock tower itself.

It was built in 1859, and renamed in 2012 to the Elizabeth Tower for the Diamond Jubilee of Queen Elizabeth II, but everyone still calls it Big Ben.

At the March Against The Far Right in London on Saturday the police presence was huge – constables on foot, in vans, in cars, parked in the main thoroughfares and side streets. And for almost the whole of the event they were doing nothing except standing ready.

Barriers like these were everywhere, stretched along streets, and here around a monument on Whitehall.

Trafalagar Square and the statue of Churchill in Parliament Square were completely fenced off with high barricades.

The march organisers had their own stewards directing people along the route. And the stage for the celebrity performers was stretched across Whitehall and surrounded by more barriers and police vehicles.