Trade unions march against cuts - in pictures

Union banners lie on the road before the anti-austerity march through London Photograph: Gary Calton/Observer

Brass bands from around the country came to London to join the march Photograph: Gary Calton/Observer

A protester adds to the din in central London with her vuvuzela Photograph: Gary Calton/Observer

A boy with University and College Union balloons under Waterloo Bridge Photograph: Gary Calton/Observer

A ceilidh band play to the marchers Photograph: Gary Calton/Observer

A masked protester stirs up the crowd Photograph: Gary Calton/Observer

A demonstrator with a balloon moves along the Thames embankment Photograph: Gary Calton/Observer

Faye Hookin from Rochester joined the demonstration. It was the first time she has marched in protest Photograph: Gary Calton/Observer

A David Cameron impersonator on in Parliament Square Photograph: Gary Calton/Observer

The demonstrators on the march move along the embankment Photograph: Gary Calton/Observer

The marchers move through London Photograph: Gary Calton/Observer

A protester blows a whistle Photograph: Gary Calton/Observer

Turtles against Tories protest against the government's austerity measures Photograph: Gary Calton/Observer