Despite the efforts of Heathrow to be more straightforward and transparent in recent years, there is still as huge legacy of distrust. The almost universal reaction by people – at least those communicating with HACAN – to the list of conditions imposed by the Airports Commission accompanying its recommendation of a third runway has been that Heathrow cannot be trusted to fulfil them. They point to this letter, written almost 20 years ago, where the then CEO of Heathrow said explicitly that the airport did not want a third runway: BAA 1999 letter to resident. Overcoming this trust deficit is possibly the biggest challenge Heathrow faces.