Noise is regulated to some extent at all UK airports. This can include noise limits and restrictions on operations. The specific restrictions will differ from airport to airport, reflecting the types of aircraft that operate there, how busy the airport is and what flight paths are.
Although maximum noise limits are set for occupational noise exposure, there is no limit defined for environmental noise, including aviation noise. However, in order to assess the significance of aircraft noise in the UK, it is generally assumed that if the average noise level in an area from 7.00am to 11.00pm is more than 57dBA Leq, it will be “significantly annoying” to the community that live and work there. The EU has established a corresponding policy threshold of 55 dB Lden, resulting in two different measures being used to inform policy at present.
This doesn’t mean that noise above these levels will not be allowed. But it does mean that noise will be an important factor in planning decisions within that area (for example, about airport expansion), and that there may be support available for noise mitigation (such as double-glazing).