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Ministers back Heathrow’s plan to move M25 for third runway

The Transport Secretary rejected a rival proposal from Arora Group, saying Heathrow’s own plans were ‘the most credible and deliverable option’.

Christopher McKeon
Tuesday 25 November 2025 11:38 EST
The Government has already said it will support a third runway at Heathrow as part of its plans to get the British economy growing again (Jonathan Brady/PA)
The Government has already said it will support a third runway at Heathrow as part of its plans to get the British economy growing again (Jonathan Brady/PA) (PA Archive)

Ministers have backed plans from Heathrow Airport’s owners that would see the M25 moved to make way for a third runway.

Transport Secretary Heidi Alexander rejected a rival proposal from Arora Group, saying Heathrow’s own plans were “the most credible and deliverable option”.

The Heathrow proposals involve building a 3,500-metre runway and require a new M25 tunnel and bridges to be built 130 metres west of the existing motorway.

The Arora plan, put forward by a group led by hotel tycoon Surinder Arora, was for a shorter, 2,800-metre runway that would not require diverting the M25.

But in a written statement to Parliament, Ms Alexander said the proposal would still have “a considerable impact” on the motorway, and require the compulsory purchase of more homes around the airport.

Heathrow expects its proposals to involve the demolition of around 750 homes, and claims the rival plan would see twice that number knocked down.

A Heathrow spokesperson welcomed the decision, saying expanding the airport “will mean more connectivity, increased trade, improved passenger experience and a huge economic boost for the British businesses that will help design and build it”.

But the spokesperson added that “further clarity” was needed on how the next phase of the project would be regulated, calling for “definitive decisions” from Government and the Civil Aviation Authority by mid-December.

Mr Arora said his group “accepts today’s announcement” and still hoped to be chosen as the “promoter” of the third runway, rather than Heathrow Airport, adding that competition was “absolutely imperative to keep costs under control at the airport”.

The planned third runway is estimated to cost £33 billion, including £1.5 billion on moving the M25, and is expected to be fully privately financed.

It will see Heathrow’s capacity increase to 756,000 flights and 150 million passengers per year.

The Government aims to make a decision on a planning application for Heathrow’s expansion by the next election, with the third runway becoming operational by 2035.

Ms Alexander said Tuesday’s decision would “allow a decision on a third runway plan this Parliament which meets our key tests including on the environment and economic growth”.

She added: “We’re acting swiftly and decisively to get this project off the ground so we can realise its transformational potential for passengers, businesses and our economy sooner.”

The proposals will be subject to further consultation as the Government overhauls the Airports National Policy Statement that governs planning decisions for airports.

The Transport Secretary has also pledged to consult the independent Climate Change Committee on the expansion to ensure it is consistent with the Government’s commitments to reduce carbon emissions.

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