Wondering why some of London's statues look a little different today? Greenpeace activists have been scaling the city's statues and putting emergency face masks on them, as part of a protest against air pollution. Nearly 10,000 people die from air pollution in London every year, which is why the organisation is calling for an expanded clean air zone. The current plan for an ultra-low emissions zone will come into effect in 2020, but only offers protection for those in Zone One.
The protesters have managed to get masks on 15 statues across the city, including Nelson's Column, the Oliver Cromwell statue at Parliament and Thierry Henry's statue at Emirates Stadium.
Photos: © Greenpeace