Indicative airspace overlay (base map by skydemon.com)The airspace over London and the Southeast is one of the most congested in the world and placing a new hub airport infrastructure will impact substantially on the existing flight paths and will require a redesign of the existing system. A new airspace design will also take into account the degree of retained capacity at Heathrow and the Single European Sky (SES) initiative to replace the existing national air traffic control systems with a Europe wide seamless system.
