Sustainable Aviation Fuel Bill

John Milne Excerpts

Report stage
Wednesday 15th October 2025 Commons Chamber

[Olly Glover]

Global demand for aviation continues to grow; it is projected to be two or three times bigger by 2050. In 2024, there was a record rate of increase in carbon emissions, according to the World Meteorological Organisation, and there was a new daily record for global aviation emissions in July 2025. Nearly half of all the carbon emissions to date from aviation have occurred since 2000.

Sustainable aviation fuel has been talked up for years as the solution, yet there has been a poor track record of unambitious targets not being matched by delivery. For example, in 2010, Boeing announced the target that 1% of aviation fuel globally should come from SAF by 2015, and in 2019, the International Air Transport Association set out hopes of reaching 2% by 2025, but today, globally, the figure is just 0.3%. The UK’s published figure this year of 1.29% is better, but it nevertheless shows how far we have to go.

The Conservative Government promised back in 2022 to have five commercial UK SAF plants operational by 2025, but there is still only one. It is therefore right of the Government to have introduced legislation to attempt to make sure that the latest set of SAF targets move from fantasy to realistic, credible and deliverable plans, although these will ultimately need to transition us towards the development of truly zero-carbon flight technology. I thank my hon. Friends the Members for Wimbledon (Mr Kohler), and for Sutton and Cheam (Luke Taylor), for their contribution to the Bill Committee, and I hope that Members from across the House will consider the Liberal Democrat amendments.

New clauses 1, 2 and 3 all increase the chances of the intention behind the Bill being realised. New clause 1 requires the Secretary of State to assess and report on the potential for disused oil refineries and similar industrial sites to be used for the production of sustainable aviation fuel. New clause 2 requires the Secretary of State to assess the measures being taken to encourage the supply of materials for production of sustainable aviation fuel, and has a focus on bioethanol plants. That is especially important in the context of the expected closure of the Vivergo bioethanol plant near Hull, following the Government’s decision not to provide it with financial support.

New clause 3 requires the Secretary of State to report to Parliament on the development of a strategy for analysing and maximising the potential of sustainable aviation fuels to contribute to reductions in greenhouse gas emissions.

I also speak in support of two new clauses tabled by my hon. Friend the Member for West Dorset (Edward Morello), both of which would improve the Bill by providing greater rigour and scrutiny of progress towards sustainable aviation fuel targets. New clause 4 would give the Secretary of State the power to increase SAF production obligations where necessary, and to ensure that reports on progress are laid before Parliament and relevant Select Committees. New clause 5 would introduce requirements for air travel providers to report on their use of sustainable aviation fuel, and to provide annual reports to the public via their websites. Collectively, new clauses 1 to 5 would strengthen the Bill and increase its credibility when it comes to SAF production and reporting on progress.

The Government’s SAF mandate requires just 22% of aviation fuel to be sustainable by 2040. That compares poorly with the European Union’s target of 32% by 2040. It is hard to square an objective of net zero aviation by 2050 with just 22% of fuel being sustainable a decade earlier, unless we put in place measures alongside SAF to cut emissions and make climate-friendly flight a reality. We urge the Government to clarify their plans for achieving their targets, particularly as hope for SAF progress is being used to state that Heathrow and Gatwick expansion are compatible with our greenhouse gas emissions reduction targets.

[John Milne (Horsham) (LD)]

As my hon. Friend says, sustainable aviation fuels are being used by the Government to justify major airport expansions. One such expansion would be at Gatwick, adjacent to my constituency. A target of 10% SAF by 2030 is optimistic in the extreme, as the Climate Change Committee said. If the Government’s own advisers do not believe in this target, why should we?

[Olly Glover]

My hon. Friend makes a good point about what the Climate Change Committee has said. That is why I hope the Government will consider these Liberal Democrat amendments, which are intended to strengthen the Bill, so that its provisions become reality this time, and contrast with the many missed targets in the past on sustainable aviation fuel.

Making aviation genuinely sustainable will require the Government to go beyond securing investment in SAF, and to ensure that in the longer term, the SAF measures complement, rather than detract from, investment in zero-carbon flight technology. I hope that the House will support our amendments, so that our country makes a bigger and more rapid contribution to decarbonising aviation.