An M25 tunnel? Rival Heathrow expansion plans explained

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Heathrow Airport has revealed details of its plan to expand and modernise the airport at a cost of £49bn. Thomas Woldbye, CEO of Heathrow Airport, said expansion was "urgent" as the airport was currently working at capacity, "to the detriment of trade and connectivity". The work would be funded by private finance. It comes after hotel tycoon Surinder Arora outlined a way to expand the airport without needing to redirect the M25. The government has backed plans for a third runway. But the plans face opposition from environmental groups, politicians, and locals. London's mayor Sir Sadiq Khan said it would have a "severe impact on noise, air pollution and meeting our climate change targets". Ross Ryan has been speaking to BBC London's Political Editor Karl Mercer about the rival plans. (Image credit: Heathrow Airport) Presenter and Producer: Ross Ryan Executive Producer: Lorraine Maguire