Defra: High pollution levels reach north

Pollution levels have eased slightly in the south-east but have now increased in the West Midlands, north-west and Merseyside, according to the Department for Environment, Food and Rural Affairs (Defra).

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High pollution now in the West Midlands, North West & Merseyside. Improvement from V High to High in the South East. http://t.co/BA1M8OK7C9

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High levels of pollution expected to clear

Air pollution levels remain high across parts of England and Wales but are expected to reduce later today. The South East and Greater London are still experiencing "high" levels of pollution, Defra warns.