More than 2 million people would be exposed to additional aircraft noise if Heathrow builds a third runway, according to a government analysis.
Department for Transport documents, released by the Civil Aviation Authority after a freedom of information request, show the government expects 973,000 households around Heathrow to experience increased daytime noise by 2050 after a third runway is built.
It said 673,800 households affected by Heathrow’s two runways will experience less noise once expansion takes place, making a net 300,000 worse off.
The DfT work was carried out for a revised national policy statement published last year, which gives the green light to Heathrow expansion if approved by a parliamentary vote expected this summer.
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