Why is it particularly bad today?http://uk-air.defra.gov.uk/latest/?zone_id=7&date=12%2F03%2F2016#summary
Why is it particularly bad today?
At a wild guess - A high pressure ridge moving across the SE of England, combined with low ground temperatures, higher air temperatures, and low wind, causing an inversion layer over the Thames Valley & London.
@NotThamesWater started
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Why is it particularly bad today?http://uk-air.defra.gov.uk/latest/?zone_id=7&date=12%2F03%2F2016#summary