Heathrow Airport's plan for a third runway, which involves moving the M25 motorway, has been chosen by the government. Two plans had been under consideration - one from the airport itself, and another from Arora Group, led by hotel tycoon Surinder Arora. Heathrow had proposed a new runway which would be up to 3.5km (2.2 miles) long and require a new road tunnel under the airport. The rival bid from Arora Group would have involved a shorter runway at a lower cost, and did not require altering the