HACAN has commissioned an independent report which suggested that – in the event of a third runway being built – an eight hour night flight regime could become the norm. This study, carried out by AvGen Limited on behalf of HACAN, examines the practicality, if and when a third runway is built at Heathrow, of implementing a full or partial 8-hour night movement curfew from 23:00 to 07:00. http://hacan.org.uk/wp-content/uploads/2017/11/AvGen-study-v1.1.pdf