The north-east option for building a 3rd runway at Heathrow. I have added the cursus as red stripe with the surviving section in purple. This could leave the cursus alone, although it’s not clear what additional supporting infrastructure would be built around the airport and where that would go. This option is unpopular because it involves bulldozing an ancient village.
Image credit: http://www.theverge.com/2013/8/13/4616820/heathrow-future-expansion-report with cursus added by me
