Britain’s Climate Change Committee has linked Heathrow’s proposed third runway to stricter aviation decarbonisation measures, saying the expansion can proceed only if airlines are made to cover the cost of cleaner fuels, efficiency gains and engineered carbon removals. The advice, published on Wednesday, effectively makes Heathrow’s growth plan conditional on a tougher policy framework for the UK aviation sector.
The committee concluded there is no credible path to add capacity at Heathrow under current climate rules while staying within the UK’s carbon budgets. It wants legislation requiring the industry to address its emissions by 2050, with the burden likely to pass through to passengers in higher fares. The recommendation comes as the government advances work on Heathrow’s expansion plans and weighs how the project would fit with the UK’s net zero target.
The Heathrow decision now adds a major climate test to one of the country’s biggest infrastructure proposals. Any move to back the runway would need to be matched by clearer rules on sustainable aviation fuel, operational efficiency and carbon removal, while also facing pressure from demand management and cost concerns across the wider market.