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UK airport expansion substantial risk to net zero: EAC

  • Spanish Market: Biofuels, Emissions
  • 24/10/25

Planned airport expansions and the limitations of decarbonisation measures the UK government is relying on for aviation put the country's 2050 net zero emissions target at "substantial risk", the cross-party Environmental Audit Committee (EAC) said today.

The government's "risky approach" in its jet zero strategy — a decarbonisation plan for the aviation sector — alongside airport expansion plans puts net zero in "serious jeopardy", the EAC said. The UK aviation sector is projected to become the country's largest emitter by 2040, according to data from the independent Climate Change Committee (CCC).

Approved expansion plans would increase passengers across London City, Luton, Gatwick and Stansted to around 151mn, up from 99.5mn. Further plans awaiting approval — including for Heathrow and additional capacity at Stansted — could add another 74mn passengers.

The government "is yet to set out how it will ensure climate, environment and biodiversity targets can be delivered whilst consenting to airport expansion; and what level of economic growth the UK can expect" from these projects, the EAC's report said.

The government plans to rely primarily on efficiency gains, emissions offsetting and sustainable aviation fuel (SAF) to decarbonise the sector. But "each have their limits… the government has so far not factored in these limitations", the EAC said.

"It is clear that the UK would not be able to produce sufficient SAF to service the level… the government currently expects the industry to use," the report found. The UK's SAF mandate started this year, requiring obligated suppliers to deliver a 2pc share, rising to 10pc in 2030, 15pc in 2035 and 22pc in 2040.

The government should set out how it will ensure carbon costs reach the levels anticipated in the jet zero strategy, and include SAF in the UK emissions trading scheme, the report recommended. The aviation sector should pay "its fair share towards mitigating its carbon emissions", and the government should clarify the penalties it will impose if the industry misses its targets, the EAC added. It also recommended including the UK's share of international aviation emissions within the national carbon budgets.

The government continues to use the Airports National Policy Statement (ANPS), published in 2018, but this pre-dates the UK's 2019 commitment to net zero by 2050, the EAC noted. It recommended that the government update the ANPS within six months to "include specific, measurable limits", including for emissions.

The government said yesterday that a "reviewed draft ANPS will be published for consultation by summer 2026". The previous aviation minister confirmed that the ANPS will be updated before a decision is taken on the Heathrow expansion.


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