An aerial view of Heathrow's third runway options

Heathrow Airport has unveiled three options for a new runway, saying each one would be "quicker and cheaper" than plans for a rival hub airport.

The airport's submission to the Davies Commission, which is looking at raising airport capacity, outlined a runway to the north, north-west or south-west of the existing airport.

The BBC's Richard Westcott took an aerial tour of Heathrow to view the potential sites.