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AllAboutLaw

Clear for takeoff? Heathrow’s contested third runway

Episode #5615 January 2026

Heathrow wants a third runway and says it has a shovel ready plan to expand the airfield for around £21 billion, with extra capacity arriving in roughly a decade if it gets the green light. The airport argues that more slots mean more routes, more passengers and upgraded facilities. Airlines are less convinced. They worry that higher airport charges will pay for the project and leave them flying from an expensive hub that passengers avoid.

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Beginner summary

Heathrow is proposing a third runway to handle more flights and passengers and to upgrade parts of its airfield. Airlines pay airport charges to use runways, parking stands and passenger facilities, and in the UK these fees are regulated by the Civil Aviation Authority (CAA) rather than set freely by Heathrow. A project of this size also needs formal planning consent, likely through a development consent order process, before construction can begin. Commercial lawyers help by mapping these approvals and turning them into clear, workable steps for Heathrow and the airlines.

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