UK to Include Aviation and Shipping in Future Carbon Budgets

Why It Matters

Including aviation and shipping aligns the UK’s net‑zero accounting with real‑world emissions, tightening policy pressure on two of the hardest‑to‑decarbonise transport sectors. It also signals stricter regulatory and market mechanisms that could reshape investment in sustainable fuels and low‑carbon technologies.

Key Takeaways

• Aviation SAF mandate targets 10% by 2030, 22% by 2040.
• UK aims cut 6.3 Mt CO₂e from aviation by 2040.
• Shipping must reduce emissions 30% by 2030, 80% by 2040.
• Domestic shipping joins UK ETS in 2026, industry calls for delay.
• International carbon credits barred from Fifth Carbon Budget.

Pulse Analysis

The United Kingdom’s decision to embed international aviation and shipping emissions into its carbon budgeting framework marks a pivotal shift in climate policy. By extending the net‑zero accounting regime to sectors traditionally treated as outside domestic control, the government is closing a significant emissions gap. This move also eliminates the use of international carbon credits for the upcoming Fifth Carbon Budget, reinforcing a more stringent, domestically‑focused emissions trajectory and signaling to markets that carbon accounting will be comprehensive and transparent.

Aviation faces a dual challenge: meeting the Sustainable Aviation Fuel (SAF) mandates—10% of fuel by 2030 and 22% by 2040—while coping with limited supply and financial strain on production projects. The government’s target to shave 6.3 million tonnes of CO₂‑equivalent by 2040 hinges on scaling SAF and curbing airport capacity growth, yet parliamentary committees warn that expansion plans at Luton and Gatwick could jeopardise net‑zero goals. The policy inclusion therefore raises the stakes for airlines and fuel producers to accelerate technology adoption and secure reliable SAF pipelines.

For shipping, the UK’s updated strategy imposes steep cuts—30% by 2030 and 80% by 2040 against a 2008 baseline—and brings domestic vessels into the Emissions Trading Scheme from 2026. Industry groups, such as the UK Chamber of Shipping, argue the timeline is premature, citing limited government support and the sector’s global nature. Simultaneously, international negotiations at the IMO on a global carbon levy remain stalled, with the United States opposing a universal price. The UK’s domestic actions could therefore influence broader global discussions, positioning Britain as a leader in maritime decarbonisation while navigating competitive and regulatory pressures.