Millions of holidaymakers will be using London's crowded airports this summer. There was a plan to build another airport at Maplin to ease the congestion, but it was abandoned five years ago. Now the search is on again, and as planners comb the south-east looking for a safe and accessible place, Derek Wood examines the need for a third London airport, and looks at current thinking on the timing and siting of this controversial project.
Producer ANNE WINDER