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.
Pollution in London over the last 24 hours hit 10/10 which are classed as 'very high' levels according to the Met Office and Defra.
To put that in context we have seen nitrogen dioxide levels more than three times higher than the EU legal limit.
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?