Sustainable Aviation Fuel Bill

Heidi Alexander Excerpts

2nd reading
Wednesday 11th June 2025 Commons Chamber

[The Secretary of State for Transport (Heidi Alexander)]

I beg to move, That the Bill be now read a Second time.

On the day when the Chancellor has set out this Government’s determination to deliver a decade of national renewal, I am proud to stand before this House to make good on our promise to deliver a sustainable aviation sector. If we are once again to be an outward, confident trading nation that is connected to the world and leading the way on innovation, we must run as fast as we can towards a greener, cleaner future for flying. The Bill before us today will enable us to do precisely that. We do not have time to waste.

[Siân Berry (Brighton Pavilion) (Green)]

Does the Secretary of State agree that this Bill has a missing half, which could cut aviation emissions by demand management, and that at the very least, if there is to be public money spent setting up this system, it should be raised from the most frequent flyers and private jets?

[Heidi Alexander]

I think the hon. Lady and I fundamentally differ on the issue of demand management, because demand for air travel is only going one way, and it is therefore our moral responsibility, if we are going to have more people in the skies, to reduce the carbon emissions associated with that.

As I said, we have no time to waste. That is why, when it comes to aviation, this Government have rolled up their sleeves and got on with the job, putting an end to the dither and delay of the past. In less than a year, we have approved the expansion of Luton airport and invited plans for a new runway at Heathrow, and I will be making a final decision on Gatwick expansion as soon as possible. We have invested in the future of aviation, not just with the help we have given to reopen Doncaster Sheffield airport or the work we are doing to strengthen connectivity around Liverpool John Lennon, but also by putting £1 billion towards aerospace technology. We have introduced the sustainable aviation fuel mandate and provided £63 million to the advanced fuels fund, helping the industry prepare for a sustainable future. Just last week, we kick-started the largest redesign of UK airspace since the 1950s, paving the way for cleaner flights, fewer delays and more direct routes. This is what governing for growth looks like.

[Rachel Hopkins (Luton South and South Bedfordshire) (Lab)]

I really welcome the Bill and the creation of a mechanism to increase the supply of sustainable aviation fuel. Can I add that, as we look towards airspace modernisation, we will have not only cleaner and quicker but quieter flights?

[Heidi Alexander]

My hon. Friend is completely right to highlight the benefits of cracking on and delivering airspace modernisation. It could mean not only more direct flights and therefore less use of carbon, but noise benefits for communities close to airports.

We are determined to make rapid progress on this issue because we have an iron-clad belief that our success as an island nation rests on our international connectivity. The flow of trade, exporting British expertise and the movement of people for business and leisure all depend on aviation continuing to grow and thrive. We could put our head in the sand and pretend that people do not want to fly, that the sector does not support hundreds of thousands of jobs, that people do not look forward to foreign holidays or family reunions and that air freight is not a significant part of our trade by value, but we would be on the wrong side of both reality and public aspiration.

The truth is that demand for flight is only going in one direction. According to the Civil Aviation Authority, passenger levels were 7% higher in 2024 than in the previous year. If we do not respond and if we do not set aviation up for long-term success, we do not just make ourselves poorer today, we kiss goodbye to the growth and opportunity this country needs in the decades to come.

I want a future where more passengers can take to the skies, not fewer. But like the rest of our economy, that must mean emitting less carbon, not more. This Bill will help secure that future. It builds on the fantastic work across Government and industry, led by my hon. Friend the Aviation Minister, which saw the SAF mandate come into effect earlier this year. As we run towards a future of green flight, we know that sustainable aviation fuel is one of the biggest levers we can pull. It emits 70% less greenhouse gases on average than fossil fuels. It can be used in existing infrastructure and aircraft engines, and it is now backed by a mandate that is rightly ambitious: 10% SAF in the fuel mix by 2030 and 22% by 2040. I want as much as possible to be made in the UK.

[Monica Harding (Esher and Walton) (LD)]

The mandate, which we welcome, calls for only 22% sustainable jet fuel usage by 2040, while the Chancellor has said that she wants a third runway in use at Heathrow by 2035. That would mean more aviation-related health hazards to my constituents. Does the Minister agree that we should not pursue Heathrow expansion until we can turbocharge the SAF mandate and bring non-sustainable fuel usage down further?

[Heidi Alexander]

The Government have been clear that we will permit airport expansion only when it is consistent with our legally binding climate change targets. SAF is one way in which we can clean up aviation, but the work we are doing on the development of new aircraft technologies, alongside the work we are doing on airspace modernisation, is all connected to how we bring those emissions down. I point out to the hon. Lady that the expansion of Heathrow has already been modelled in relation to the sixth carbon budget.

We have been clear that the mandate alone is not enough. Creating the demand for SAF but not the supply does not get us where we want to be. We have heard the industry’s concerns around risk and uncertainty for investment, and that is why we are acting today. The Bill creates a revenue certainty mechanism that will boost SAF production by giving investors confidence to choose the UK.

[David Davis (Goole and Pocklington) (Con)]

I declare an interest as a pilot. In this context, I spoke to one of the would-be producers—I think it is called Zero—and its primary concern with respect to the strike price mechanism that the right hon. Lady talks about is how that will be set and what input producers will have. Will she address that when she talks through the mechanism?

[Heidi Alexander]

There is more detailed design work to do on all that, and we will work alongside industry to ensure that we have a workable proposition.

The mechanism boosts SAF production and gives investors confidence in the UK by addressing one of the biggest barriers to investment: the lack of a clear, predictable market price for SAF. That starts with a guaranteed strike price agreed between a Government-owned counterparty and the SAF producer. If SAF is sold for under that price, the counterparty will pay the difference to the producer. If SAF is sold for above that price, the producer will pay the difference to the counterparty.

The revenue certainty mechanism will be funded by industry, specifically through a levy on aviation fuel suppliers. That makes sense for two reasons. First, it is the industry that will benefit from more and cheaper SAF production, so it is only right that industry, and not the taxpayer, should fund it. Secondly, placing the levy higher up the supply chain spreads costs across the sector and is the least burdensome option. It is important to note that the revenue certainty mechanism will not be indefinite. It will be targeted and time-limited, helping to get first-of-a-kind UK projects off the ground. The Bill’s sunset clause means that we can offer contracts only for 10 years, unless it is extended via the affirmative procedure. We will have a firm grip on costs throughout. We will decide the number and duration of contracts, limit support to a predetermined volume of SAF and negotiate acceptable strike prices. There is no obligation on the Government to enter into a defined number of contracts or to agree contracts at any cost.

I know that some hon. Members may be concerned about the impact on passengers, so let me reassure them: none of this will limit people’s ability to fly. We expect minimal changes to fares, with an average ticket increasing or decreasing by up to £1.50 a year. I am pleased to say that this is a product of many months of consultation with the industry. Airlines are calling for it, airports are calling for it, SAF producers are calling for it, environmental organisations are calling for it, and the Government are therefore getting on with delivering it.

[Sir Julian Lewis (New Forest East) (Con)]

I am sure that we wish the Government well in what they are trying to do. I gather that the International Air Transport Association highlighted only last week that, at the moment, sustainable aviation fuels cost approximately five times as much as conventional jet fuel. Will she explain how the measures in the Bill will bridge that gap to make it economical?

[Heidi Alexander]

Supply is constrained at the moment; the UK has one commercial production facility, in Immingham. We need to build investor confidence to commercialise some of the sustainable aviation fuel demonstration projects around the country. More supply and lower prices are good for the aviation sector and, ultimately, good for those who wish to fly.

I think it is worth taking a moment to reiterate what is at stake. When UK production of low-carbon fuels is up and running, it could support up to 15,000 green jobs, contribute £5 billion a year to our economy, and deliver clean and secure energy. What is more, fulfilling the SAF mandate could save up to 2.7 megatonnes of carbon dioxide equivalent a year by 2030. Seizing those opportunities will ensure that we deliver on our bold plan for change and that the UK and our world-class aviation sector are leading the way in the race towards sustainable flight.

This country cannot be open for business, open to investment and open to growth yet have a closed mind when it comes to international connectivity. The Bill is a clear signal that we will not accept false trade-offs that pit aviation’s growth against our commitments to net zero. We can and must do both. We have the opportunity of a lifetime and, I believe, a moral mission to future-proof aviation. When the sector succeeds, it is not only a source of growth, through trade, business and tourism, but a source of joy, aspiration and opportunity. It is as vital today as it will be for future generations. Their need to fly, explore the world and do business requires us to act now. That is what the Bill does, and I commend it to the House.

[Madam Deputy Speaker (Ms Nusrat Ghani)]

I call the shadow Secretary of State.