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<p>Night flying restrictions set by the Government at Heathrow comprise a movement
limit and a noise quota limit set for each summer and winter season. Up to 10% of
unused movements or noise quota may be carried over to the next season. The limits
apply to the period 23.30-06.00. There are additional restrictions on movements by
the noisiest aircraft in the period 23.00-07.00. None of these restrictions was breached
between 2012-2014.</p><p> </p><p>In addition the Government sets departure noise limits
which include lower limits at night. Infringements of these limits are reported in
Heathrow’s Flight Performance Reports published on its website, the latest of which
covers the period up to the end of September 2014.</p><p> </p>
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