High pollution levels in London are expected to fall. The capital has been blighted by increased levels this week with London Ambulance Service reporting a 14 per cent increase in emergency calls for people experiencing breathing problems.
The number of people experiencing breathing problems increased by 34 per cent on Thursday, London Ambulance Service has said.
The capital experienced "very high" pollution levels yesterday but air quality is expected to improve today.
Boris Johnson was accused of "dangerous complacency" after urging Londoners to "keep a sense of proportion" over the pollution scare.
Pollution levels in London are 'high' today according to the Government and the Met Office but what is causing the increase?