The Transport Secretary has declared that a third runway at London Heathrow airport is "critical" to the nation's economic growth, as the government published its long-awaited blueprint for the expansion project.
Government Blueprint Published
Publication of the airports national policy statement marks the most significant step towards a new runway at Heathrow since Chancellor Rachel Reeves announced the government's intention to proceed with the scheme in January. The controversial plan, estimated to cost £33 billion, would involve moving a section of the M25 motorway.
Transport Secretary Heidi Alexander stated: "The Government considers that the development covered by the Heathrow expansion NPS is critical to national growth and therefore plans to designate expansion at Heathrow as critical national growth infrastructure." She emphasised that this designation signals the importance placed on expansion and will be a key factor in planning decisions.
Two Proposals on the Table
Two expansion proposals have been presented to the government. Heathrow Airport Limited (HAL) seeks permission to build a full-length 3,500-metre runway, requiring the M25 to be diverted. This privately financed scheme would boost capacity to 756,000 flights and 150 million passengers annually. Alternatively, hotel tycoon Surinder Arora proposes a 2,800-metre runway that would not involve moving the motorway. In November, Ms Alexander expressed her preference for the full-length option.
Conditions and Concerns
The draft plan requires applicants to demonstrate how transport networks will accommodate increased passenger numbers, including necessary road and rail improvements. Expansion must be compatible with the UK's legally binding climate targets, avoid new breaches of air quality limits, and ensure noise emissions do not exceed 2024 levels, with reductions where possible.
The 10-week consultation launch coincides with the Makerfield by-election, where Andy Burnham is standing as Labour's candidate. Mr Burnham has previously voiced concerns that Heathrow expansion diverts infrastructure investment "away from the North and traps it in London."
Political and Industry Reactions
Chancellor Rachel Reeves, speaking at the Times CEO Summit, expressed determination to get "spades in the ground" for the third runway within the current Parliament and complete it by 2035. She argued that Heathrow is "not punching its weight" as a hub airport and represents a classic example of the UK's difficulty in delivering major infrastructure projects.
Heathrow chief executive Thomas Woldbye welcomed the announcement, stating: "The publication of the draft Heathrow expansion national policy statement represents something Britain has often found difficult in recent years: progress." He highlighted that the plan is privately funded by global investors and widely supported by businesses, trade unions, and communities.
However, environmental groups expressed strong opposition. Alethea Warrington, head of aviation at climate charity Possible, accused the government of living in a "fantasy land" if it believes a new runway can be built without worsening noise pollution, toxic air, or undermining climate targets.



