The Climate Change Committee (CCC) has issued a warning regarding the proposed expansion of Heathrow Airport, emphasizing that such development cannot proceed within the UK's current climate policy framework without significant reductions in aviation emissions. The committee states that for expansion to be compatible with the UK’s legally binding carbon budgets and the Net Zero target for 2050, the aviation sector must implement comprehensive strategies to reach zero emissions, including direct reductions and engineered removals.
The CCC's advice was sought by the UK government in the context of assessing the draft Heathrow Expansion National Policy Statement (HENPS). The committee argues that the climate assessment in the policy must be strengthened to explicitly integrate the UK’s 2050 Net Zero commitment.
Data from the report reveal that aviation emissions have more than doubled since 1990, where Heathrow currently accounts for approximately half of all UK aviation emissions. This rise occurs despite a halving of emissions across other sectors of the economy during the same period.
Nigel Topping, Chair of the CCC, emphasized the seriousness of the situation, stating: "Emissions from flying are projected to increase further even without Heathrow expansion, and the UK lacks a credible plan to curb this growth. This poses significant challenges to our climate commitments." He called for policies ensuring that the aviation industry bears the full costs of decarbonization in the coming decades.
“Our advice today is clear – Heathrow expansion is not currently compatible with the UK’s Net Zero target. Government needs to ensure that the aviation industry takes responsibility for the emissions it creates and bears the costs of decarbonisation. Those conditions do not exist today,”
- Nigel Topping CMG
The report details a pathway to achieve Net Zero aviation by 2050, based on the principle that polluters should pay. It projects that engineered removals will contribute 36% of the necessary reductions, with demand reduction at 24%, efficiency improvements at 20%, and sustainable aviation fuels (SAF) at 20%. Industry actors are expected to finance SAF and engineered removals.
The CCC recommends that UK aviation policy prioritize funding decarbonization by the industry, prepare for uncertainties in technology deployment, safeguard competitiveness, and promote equitable distribution of costs, particularly to avoid unfair burdens on lower-income groups who rarely fly. The committee also calls for stronger international cooperation through the EU and ICAO to mitigate risks such as carbon leakage and to maintain global competitiveness.
Ultimately, the report asserts that permitting airport expansion under current policies would undermine the UK's efforts to meet its climate targets and calls for policies that ensure the industry's accountability and responsible development.
