Greenpeace actvists have been arrested after putting gas masks on the faces of London statues.
The environmental group scaled Nelson's Column in Trafalgar Square and also attached masks to statues of Oliver Cromwell and Winston Churchill outside Parliament, Eros at Piccadilly Circus and Thierry Henry at Arsenal FC’s Emirates Stadium.
In total 18 monuments were targeted as part of the stunt.
Greenpeace said it aimed to highlight air pollution levels in the capital.
Campaigner Areeba Hamid said: "Monitoring shows that, if these statues were real people, many of them would often be breathing dangerous, illegal air.
We need a clean air zone covering a large part of the city. Whoever wins the election has to stop the talk and start the action."
