Other central London locations feature in the top 50

Cockspur Street near Trafalgar Square registered 138 micrograms Credit: John Stillwell/PA Wire

Other highly polluted areas include Oxford Street near Marble Arch, which registered at 150 micrograms, and Cockspur Street near Trafalgar Square on 138 micrograms.

The fourth and fifth locations were Park Lane and Knightsbridge - which measured 135 and 134 micrograms respectively.

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Highest air pollution in UK around Buckingham Palace

Buckingham Palace suffers from the highest level of air pollution in the country with almost four times the European legal limit.