On 4 August 2026, the Department for Transport said the Court of Appeal had dismissed the challenge to Gatwick Airport’s Northern Runway expansion and had also refused permission for the campaign group to appeal. For the project, that removes the immediate appellate obstacle to implementation, with ministers now treating the long-running dispute over legal validity as closed. (gov.uk) The government’s timetable remains that first flights from the extended Northern Runway will depart from 2030. The same announcement says expansion is expected to allow up to 100,000 additional flights a year and wider passenger choice from an airport that already serves more than 200 destinations. (gov.uk)
This is not a wholly new runway in planning terms. According to the Planning Inspectorate and the High Court record, the scheme authorised by the Development Consent Order allows Gatwick to alter and reposition the existing northern runway, lift the current limits on its routine use, and operate the airport on a dual-runway basis with associated terminal, highway, river and ancillary works. (gov.uk) The High Court summary records that arriving aircraft will continue to use the existing main runway, while departing flights will be shared between the main runway and the repositioned northern runway, with the northern runway used mainly by smaller aircraft. The Planning Inspectorate has said the project is intended to support up to 80 million passengers a year. (judiciary.uk)
The application was examined under the Planning Act 2008 regime for nationally significant infrastructure projects. Gatwick Airport Limited submitted its application on 6 July 2023 and the Planning Inspectorate accepted it for examination on 3 August 2023. (gov.uk) After the Examining Authority reported on 27 November 2024, Transport Secretary Heidi Alexander issued a minded-to-approve letter on 27 February 2025 rather than a final decision, because the Examining Authority had proposed an alternative order with additional operational controls that required further consultation. The Secretary of State then made the Development Consent Order on 21 September 2025, with the Planning Inspectorate announcing the decision on 22 September 2025. (gov.uk)
The litigation that followed was a judicial review of the Secretary of State’s 21 September 2025 decision to make the Gatwick Airport (Northern Runway Project) Development Consent Order 2025. On 23 June 2026, Mr Justice Mould dismissed the claims brought by Peter Barclay and Communities Against Gatwick Noise Emissions, and the High Court record notes that the order had already been through an extensive further consultation process after the Examining Authority’s report. (judiciary.uk) The Court of Appeal then listed permission-to-appeal hearings for 27 and 28 July 2026. The Department for Transport’s 4 August 2026 announcement states that the legal challenge was dismissed and that permission for a further appeal was refused, leaving the Development Consent Order in force. (judiciary.uk)
In economic terms, ministers are presenting the project as a South East growth measure rather than a narrow airport upgrade. The Gatwick-commissioned Oxera assessment linked from the government announcement estimates a net local impact of about 14,000 jobs and roughly £1.1 billion in annual GVA by 2038, stated in 2021 prices. (gatwickairport.com) The Department for Transport says the scheme will also support up to 100,000 extra flights a year and expand choice from an airport that already serves more than 200 destinations. That is the basis on which ministers are placing the project inside the government’s wider growth programme as well as aviation policy. (gov.uk)
The approval is not presented as unconditional. The Department for Transport says any airport expansion project, including Heathrow proposals, must meet strict conditions on air quality, carbon emissions and noise. (gov.uk) That position is reflected in the legal record. The High Court summary notes that the final order included a wide range of additional and varied environmental controls, and the judgment records that the authorised development and airport operation must be carried out in accordance with a carbon action plan unless the Secretary of State agrees otherwise in writing. The same judgment also records a review mechanism for future air-noise limits. (judiciary.uk)
The ruling also sits inside a broader aviation policy position set out by ministers: airport capacity growth is being advanced alongside decarbonisation funding. In June 2026, the Department for Transport announced a £219 million low carbon fuels fund to support sustainable aviation fuel production, and in January 2026 it announced up to £43 million for green aviation research including hydrogen, zero-emission aircraft and contrail work. (gov.uk) For departments, regulators and local authorities, the next test is delivery. The legal approvals now exist, but future scrutiny is likely to centre on how Gatwick meets its carbon, noise, air quality and surface access obligations as construction and operational planning move forward. (judiciary.uk)
For residents and local authorities, the court ruling changes the focus of engagement. The main questions now move from whether consent was lawfully granted to how the consented scheme is implemented and monitored through the Development Consent Order framework. (judiciary.uk) For airlines and passengers, the effect is more direct. Unless the timetable changes, Gatwick can now plan on the basis of 2030 operations from the extended Northern Runway, with the airport’s second-runway strategy moving from litigation and consent into delivery. (gov.uk)