Gatwick Airport has moved closer to beginning work on its Northern Runway Project after the High Court dismissed two legal challenges to the government’s approval of the £2.2 billion expansion.
Mr Justice Mold rejected claims brought by local resident Peter Barclay and Communities Against Gatwick Noise Emissions, confirming that the Secretary of State for Transport had acted lawfully when granting the project’s development consent order in September 2025.
The ruling removes a major legal obstacle from Gatwick’s plan to bring its existing northern standby runway into routine use alongside the main runway. The project requires the northern runway to be moved 12 meters so that departing aircraft can use both runways, while arriving flights continue to use the main runway.
Gatwick expects the expansion to increase annual passenger capacity by approximately 13 million, taking the airport towards 80 million passengers a year by 2047. The program also includes terminal extensions, taxiway changes, surface-access improvements and other infrastructure needed to support dual-runway operations.
The claimants had challenged the government’s assessment across several areas, including greenhouse-gas emissions, international aviation, non-CO2 climate effects, aircraft noise, wastewater and the economic case for expansion. They also questioned whether the decision was consistent with national aviation policy and environmental-assessment requirements.
The original proposal had undergone an unusually complex approval process. The Planning Inspectorate’s Examining Authority concluded that the harm associated with Gatwick’s initial draft consent order would outweigh its benefits and recommended refusal in that form. It then proposed an alternative version containing tighter controls covering noise, transport, water and other environmental effects, concluding that the revised safeguards changed the balance in favor of approval.
The Secretary of State subsequently granted consent based on a further amended version of that order. The High Court has now upheld that decision, leaving Gatwick able to continue detailed design, financing and construction planning unless the claimants secure permission to appeal.
Under the accelerated timetable introduced for challenges to nationally significant infrastructure projects, any application for permission to appeal must be made within seven days. The process was the first Gatwick expansion case heard under the new timetable, with the judicial-review hearing taking place within 11 weeks of the claims being issued.
Gatwick described the judgment as an endorsement of the government’s decision and said it would release further project details in due course. The airport estimates that the Northern Runway Project could create 14,000 jobs and contribute an additional £1 billion to the UK economy each year. Those figures remain Gatwick’s own forecasts and will depend on the timing, scale and delivery of the expansion.
The ruling gives Gatwick greater strategic certainty as it prepares one of the largest privately financed UK transport projects currently approved. Management must now convert planning consent into a deliverable construction program while meeting the environmental, noise and surface-transport conditions built into the development order.
A successful expansion would strengthen Gatwick’s ability to attract airlines, add routes and compete for traffic across London and the South East. The commercial opportunity is substantial, but the project will remain under scrutiny from local communities, environmental groups and regulators throughout construction and future operation.
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Image credit: N Chadwick
