A new poll from Populus, commissioned by Heathrow and released by them on 21st September, reveals mixed views on the third runway. 50% of people in the 15 local authority areas closest to the airport backed a new runway, with 32% opposed. The results are not dissimilar to the ones the polling company, Populus, has carried out over the years. HACAN has been critical of the methodology Populus use and took legal advice on challenging them. The lawyers felt that Populus were not doing anything illegal although some of their questions bordered on being leading questions. With that in mind support for a 3rd runway may be few percentage points lower than they claim but their broad findings are consistent with other polls.
Here is the link to the full poll: https://www.populus.co.uk/poll/heathrow-airport-poll/ .