Thousands of Londoners would hear a plane “every 90 seconds for 13 hours/day” if Heathrow 3rd runway is built
Heathrow knows it cannot get a 3rd runway unless it can somehow persuade people that there will be less noise from 50% more aircraft than there is today. In order to try and achieve this miraculous result, some massaging of figures is needed, and some clever use of statistics. In reality, it is likely that with three runways, tens of thousands of people in west London would lose half of their daily “noise-free” period (from runway alternation – switching runway at 3pm). HACAN, the group campaigning against the noise impacts of Heathrow, and thus against Heathrow’s expansion, say some areas would have planes passing overhead every 90 seconds for a “nightmarish” 13 hours a day. HACAN discovered the noise data “buried” in an appendix to one of Heathrow’s reports sent to the Airports Commission and “slipped out” before the holidays. It appears likely that residents under the southern flight path, including areas such as Richmond, would lose almost 4 hours of their 8 hour quiet period. People living under the current northern flight path would continue to get about 8 hours of respite but HACAN claim this would be spoiled for many because they would hear aircraft from one of the two other runways on either side of them.