--- title: "Heathrow third runway timeline slips to 2039 amid political uncertainty" publisher: "Stockmark.IT" author: "Stockmark.IT Website" published: "2026-09-28T07:02:56+00:00" modified: "2026-09-28T07:02:56+00:00" date: 2026-09-28 canonical: "https://stockmark.it/burnham-dodges-questions-on-heathrow-third-runway-as-project-faces-fou/" category: "Airport" categories: ["Airport", "Financial", "Investment"] image: "https://i0.wp.com/stockmark.it/wp-content/uploads/2026/09/heathrow-third-runway-timeline-slips-to-2039-amid-political.png?fit=1536%2C1024&quality=80&ssl=1" format: "news" language: "en-GB" --- # Heathrow third runway timeline slips to 2039 amid political uncertainty **Published:** September 28, 2026 **Author:** Stockmark.IT Website **Categories:** Airport, Financial, Investment **Featured image:** ![Heathrow third runway timeline slips to 2039 amid political uncertainty](https://i0.wp.com/stockmark.it/wp-content/uploads/2026/09/heathrow-third-runway-timeline-slips-to-2039-amid-political.png?fit=1536%2C1024&quality=80&ssl=1) --- Plans for a third runway at Heathrow Airport have been pushed back by up to four years, with the operator now targeting an operational date of 2039 rather than the previously stated 2035. The delay follows a refusal by the prime minister to commit to supporting the controversial expansion, which has left the project’s future in significant doubt. The airport authority has indicated that it hopes to secure planning permission by 2029, after which the new infrastructure would be completed within a decade. This revised timetable reflects growing challenges in securing the necessary regulatory approvals and political backing for one of the largest infrastructure projects in the United Kingdom. The uncertainty surrounding the project was highlighted during the Labour party conference in Liverpool, where Andy Burnham avoided giving a definitive answer on whether he supported the construction. Describing the issue as contested, Burnham stated that it was principally a matter for London and its members of parliament. He noted that there were differing views on the expansion and that these perspectives needed to be taken seriously before a final decision could be made. Burnham, who has previously criticised the proposal, said he did not wish to jump to conclusions before considering the results of a public consultation that took place over the summer. This cautious approach underscores the lack of clear political consensus on the matter, with the prime minister also declining to state whether he backs the project. The proposed expansion involves a £33 billion investment to build a new runway, which would allow the airport to operate up to 756,000 flights annually. Currently, the number of flights is capped at 480,000. The construction process would require significant civil engineering works, including the demolition of hundreds of homes, the diversion of rivers, and the rerouting of a section of the M25 motorway through a tunnel. Proponents of the scheme argue that it would create approximately 100,000 jobs and provide a substantial boost to the wider UK economy. Heathrow maintains that its existing runways have been at full capacity for over two decades, limiting growth for the airport and the national economy. The company claims the project would unlock capacity for 40 airlines that wish to operate new or increased services. However, the delay has drawn criticism from environmental and community groups. Tony Bosworth, a climate campaigner at Friends of the Earth, argued that pushing back the start date makes the already questionable economic case for expansion even more dubious. He stated that any potential gains from the project are vastly outweighed by the social and environmental costs. Robert Barnstone, coordinator of the No 3rd Runway Coalition, supported the view that the decision should be made in London, noting that vast swathes of Londoners would have to endure increased noise and poorer air pollution as a result of the expansion. These concerns highlight the ongoing debate over the local impact of the project on communities across the capital. In contrast, trade union leaders have voiced strong support for the third runway. The leaders of the Unite and GMB unions spoke in favour of the project, with the GMB urging the government to clear planning bottlenecks to support an expected 108,000 jobs linked to the plans. Warren Kenny, the GMB London regional secretary, warned that every year of delay resulted in apprenticeships not started, contracts not signed, and wages not paid. He argued that a project taking longer to build was not a reason to abandon it, but rather a reason to start immediately. Sharon Graham, the general secretary of Unite, agreed that the project was important for securing the future of unionised jobs and providing a guaranteed market for UK steel. A spokesperson for Heathrow stated that it was right for ambitious targets to be set and that the sooner expansion began, the sooner the whole UK would benefit. The company emphasised that its focus has always been on securing planning permission by 2029, after which the runway would open within a decade. The spokesperson described the project as a national initiative, 100 per cent privately financed, which would support growth today and secure the UK’s position in the global economy. However, a paper published by the Department for Transport this summer indicated that airports elsewhere in England and Wales are likely to lose millions of passengers if Heathrow builds a third runway, posing a significant risk to regional jobs. Further government analysis suggested that the overall economic boost could be less than previously hoped, and that expanding the airport could have a major adverse effect on local health. A department spokesperson confirmed that there is currently no live planning application for a third runway and that the government would continue to work with stakeholders to ensure the right framework is in place for a planning application to be considered. --- **Original URL:** https://stockmark.it/burnham-dodges-questions-on-heathrow-third-runway-as-project-faces-fou/ *Created by [WP Markdown Endpoint](https://wpmarkdownendpoint.com/)*