Sustainable Aviation Fuel Bill

Ruth Cadbury Excerpts

2nd reading
Wednesday 11th June 2025 Commons Chamber

[Ruth Cadbury (Brentford and Isleworth) (Lab)]

I start by thanking the Secretary of State for Transport for her speech. I also thank her and the Aviation Minister, my hon. Friend the Member for Wythenshawe and Sale East (Mike Kane), for coming to speak to the Transport Committee earlier this year about aviation and, of course, wider matters.

I welcome the introduction of the Bill, and I was pleased to hear the remarks of the shadow Secretary of State, the hon. Member for Orpington (Gareth Bacon). The Bill will play an important role in our work to decarbonise our aviation sector. Some 7% of domestic greenhouse gas emissions come from domestic and international flights, and it is estimated that this figure will increase to 11% by 2030 and 16% by 2035. We all know the huge challenges involved in decarbonising aviation, and this Bill is a much-needed step towards addressing them. I am glad that the Government are taking action, and I know that many in the industry want to ensure that the Bill is operational as soon as possible.

As I am sure the Transport Secretary will appreciate, I have a few questions about the Bill, which I am sure will also be raised at later stages of its progress. However, I start by saying that it is rare to find a Bill on which there is so much agreement; every major airline I have met has mentioned its support for SAF, and there is widespread agreement that we need a price certainty mechanism. That is a sign that the Government have been pragmatic, working with business and—in the case of SAF—working to ensure that we have domestic capacity here in the UK.

I am glad that the Bill will start to move us away from our dependency on imported fossil fuels, particularly for aviation. This House may forget that our reliance on foreign fossil fuels meant that in 2022, we had to spend more than £35 billion bailing out our energy market. That reliance leaves us reliant on the whims of autocratic regimes across the world. We need to move away from that costly model and, in turn, bring investment into our regions, growth to our economy and much-needed tax revenue to our Treasury.

I am glad that the UK Government are working to make sure that we continue to lead on decarbonisation and to reduce our carbon emissions in line with the Paris agreement. I want to touch on the nature of the SAF we will be using. First and second generation SAFs are made from waste—the first from used cooking oils predominantly, and the second from waste such as household black bin bag waste. Where do the Government see that waste coming from in the future? How does that tie in with our efforts to reduce our residual waste, particularly black bin bag waste, and wider efforts to reduce the non-recyclable waste that we produce? Is a large part of our household waste not already going to waste-to-energy plants, providing electricity that we depend on?

There is a lot of support for SAF in America and, as with ethanol, it offers a huge chance for large-scale agricultural businesses to profit from the sale of their waste and their oil. Ethanol is often produced in the same plants as SAF. In seeking to secure UK domestic production of SAF, what could the challenges of the US-UK trade agreement mean for our biofuel industry and its ability to transition to producing SAF? Has the Department modelled the economic and environmental impact of providing resources for second generation SAF? What is the timescale to bring on third generation SAF?

One issue that has been raised with me is whether companies looking at producing SAF will be able to enter negotiations with the Government before the Bill reaches the statute book. I understand that that has been the case for the mechanism for renewable energy projects, where negotiations began early to ensure that the investment is locked in.

We need to see changes in aviation to meet our ambitious climate goals. Now that aviation and shipping are included in our carbon budget, those changes are even more important, and I hope that the Government will also look beyond SAF when thinking about decarbonising aviation. SAF is not and will not be the silver bullet solution to the sector’s responsibility to this country’s decarbonisation strategy.

[Deirdre Costigan (Ealing Southall) (Lab)]

My hon. Friend, like me, represents a west London constituency. Brentford and Isleworth is very close to my constituency of Ealing Southall. She will know that while our constituents support the work towards a more sustainable air industry, they also want to see work to reduce the noise we hear in west London from the airline industry. Does she agree that the airline industry must also look at new, quieter planes and airspace modernisation for those communities?

[Ruth Cadbury]

My hon. Friend and neighbour is absolutely right, and I know that the plane and engine manufacturers are continuing to work—as they have done for decades, to be fair—on quieter and less polluting aircraft. Sometimes there is a tension between those two. Airspace modernisation will not make a lot of difference to my constituency in terms of landing aircraft, but overall airspace modernisation will play a part in reducing emissions and flight times for passengers.

As I have said, SAF is not and will not be the silver-bullet solution to the problem of aviation’s responsibility for decarbonisation. The Climate Change Committee warned Parliament in 2023 that relying on SAF alone was “high risk”. For example, Heathrow airport is already the single greatest source of carbon emissions in the UK, and the current plans for expansion would add an extra 8 to 9 megatonnes of carbon dioxide a year. If the Government do expand Heathrow, other airports across the UK will have to make cuts to ensure that aviation does not breach its carbon targets. Furthermore, continuing increases in aviation emissions will have to be offset against significant cuts in emissions in other sectors. I should like to hear from the Transport Secretary what the Government are doing to address that particular challenge.

When the Transport Committee considered SAF during the last Parliament, we found that it had “significant potential”, and I know that there is support throughout the House for us to reduce carbon and other greenhouse gas emissions from aviation. As Chair of the Committee, I also know how widespread support across the sector is for decarbonisation, and that many private companies are already way ahead in preparing for the future. This country needs to stay ahead of the game internationally, and I am glad that by introducing the Bill the Government are showing their commitment, investing in UK industry, and showing that the UK can be a leader on sustainability.