Sustainable Aviation Fuel Bill (First sitting) - 15th July 2025

Here are the climate-related sections of speeches by MPs during the Commons debate Sustainable Aviation Fuel Bill (First sitting).

Full text: https://hansard.parliament.uk/Commons/2025-07-15/debates/8D83EA2C-CDA0-476B-B11F-2151947D4753/SustainableAviationFuelBillFirstsitting

Greg Smith (Conservative)

We need to get the RCM right. The design matters to make sure that we get the most from it and deliver the most cost-competitive, efficient decarbonisation of the sector while supporting and protecting UK consumers as well as fliers. We think that we can do that with a well-designed RCM. We know that many of the design elements will come through in secondary legislation and further consultation after this point, so we do not see anything in the Bill that is particularly problematic.

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Greg Smith (Conservative)

One thing is absolutely clear: this is very well-intentioned. We all wish to decarbonise, but I think we have to call out some fundamental flaws in the Bill. I do so with the aim of saying, “Let’s make sure that we can be really clear about what this is doing and what some of the potential unintended consequences are.”

First, I think it is important to say—this might sound slightly controversial, but I do not wish it to be—that this is not a step that will decarbonise. It is a step that will increase the production of sustainable aviation fuel. The way you decarbonise is effectively by incentivising consumption of sustainable aviation fuel, which we already do through the SAF mandate. The SAF mandate is a reasonably well-developed tool that sets a volume threshold and a buy-out price. That is a major lever that you pull as a Government to incentivise consumption. Let us be clear that this is around incentivising production.

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Graeme Downie (Labour)

The worst case scenario is that, in 2030, the mandate essentially fails because there is high buy-out, all the cost gets passed on to airlines, there are no SAFs, which means no decarbonisation, and then we are unable to claim our SAF against the emissions trading scheme obligations, for example. To be clear, we do not think that the RCM should cover all mandated volumes of advanced SAF; there needs to be competition. It should be there to get those first plants built, and to provide a quantity of that mandate—potentially a substantial quantity, but part, not all, of it.

Gaynor Hartnell: The question was about the impact on global supply. I think Rob is absolutely right that the UK’s policy is unique. It is very much envied. I have been at many conferences where the greenhouse gas basis, versus it being volumetric, was lauded. The existence of the RCM is envied by SAF developers in other jurisdictions. It is already having an influence globally by being visible in doing this special seeking-out of waste-based SAFs, which are incredibly challenging to develop. These projects are very complicated, which is why the RCM is totally necessary; I disagree with Paul Greenwood about that.

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Chris Vince (Labour)

Rob Griggs: To take the second point first: on the environmental side, UK aviation is committed to net zero 2050. We have not wavered from that commitment, and SAF is a hugely important part of that. It is doing the physical and metaphorical heavy lifting for our road map to get there. We need to do a lot of things—there is no silver bullet—but the last industry road map we all agreed had SAF at around 40% of the decarbonisation to 2050. That number will obviously change, but it is hugely important. The UK has a world-leading aviation industry, which does a huge amount for the UK economy. We believe we can grow and decarbonise, but we cannot do that without SAF. It is hugely important for both its economic and social benefits.

In terms of next steps, we fully support the Bill, and we hope the process can go as quickly as possible to get that certainty for investors and help to get those first plants built. For us, it is then down to the importance of scheme design and ensuring that we look to get that balance right for the most cost-effective decarbonisation to meet all those objectives: what size of scheme, how many and what type of projects are supported, what proportion or volume of SAF it would be looking to support and, through that, how you ensure there is competitive tension between those projects that are bidding for support and those projects that do not think they need support. It is about getting that right to ensure that we are getting best value from the projects that will deliver best bang for their buck and can produce the volumes that we need quite quickly. There are a lot of different technical elements.

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Paul Kohler (Liberal Democrat)

Underlying all of this, the SAF mandate creates a market for greenhouse gas certificates, and the price of those certificates will be variable. It is very much built on a preceding policy—the renewable transport fuel obligation for road transport. That was just a demand mechanism without any accompanying equivalent to this revenue certainty mechanism. We import 85% of our road fuels, and we are not doing a very good job, I must say, given the opportunity, at preserving those early movers of projects that were built in the early days. Getting project funding is challenging, and it is not made easier by the fact that we have some early movers that are not managing to keep their renewable fuel projects going. I am talking about the bioethanol producers.

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Euan Stainbank (Labour)

Q Thank you, Mr Pritchard. Both Airlines UK and RTFA touch on this in their written submissions, but using municipal solid waste will give a substantially higher greenhouse gas saving than incinerating it, as is currently done. What do you think the Government could do further to incentivise use of the feedstock in that way, rather than seeing more energy go towards waste projects and incineration, or do you anticipate that the revenue certainty mechanism and the sub-mandate will be sufficient?

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David Reed (Conservative)

You also asked about the waste hierarchy and what could be done to encourage residual municipal solid waste to find its way to the best carbon outcome, rather than being used to produce electricity, which is already going on to a largely decarbonised grid. Adjusting the waste hierarchy to recognise the carbon benefits of this route for residual solid waste would be really helpful. At the moment, local authorities are in a situation where they have a reliable route through just sending it off to an energy from waste project, against prospects of hopefully SAF projects coming down the line in future, if all else goes well, then RCM comes along and they win contracts. There is a lot more risk involved in choosing the SAF route. That has to be specifically encouraged, and the waste hierarchy would be a way of doing that.

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10:12 Greg Smith (Conservative)

Jonathon Counsell: We are huge supporters of the Bill. As Luke has said, SAF is critical to decarbonising aviation. There is no silver bullet, but this gets pretty close. We think that by 2050, 70% of our fuel will be SAF.

There are three types of SAF: first, second and third generation. Quite clearly, the first generation is all that you can buy today, and 95% of it is from hydroprocessed esters and fatty acids—used cooking oil. However, that will hit feedstock constraints in the early 2030s, so we are going to start to cap out on the amount of 1G SAF we can produce. That is why 2G and 3G are critical if we are to meet long-term decarbonisation targets. We expect that by 2050, 90% of SAF will be 2G and 3G, so it is critical that we have a policy mechanism that incentivises 2G SAF.

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10:15 Greg Smith (Conservative)

Lahiru Ranasinghe: From a strategic perspective, there are three things we are trying to do as an airline. We want to grow, to do so sustainably while decarbonising at the same time, and to keep fares affordable for consumers. For us to be able to do that, we need a functioning SAF market to develop over time, so that supply and demand are balanced and the market is working under its own steam. Right now, the 2G and 3G SAF technology has been developed but there is a key transition period it needs to go through, to get from technology demonstrations to commercial scale. That is where the market failure is which is being addressed by the RCM. Like my colleagues, we are supportive of the RCM. It is clear to us that the eyes of the world are on the UK to see how we make this work.

A step down from that, there is a not quite as bad, but still bad, scenario in which the market is short on supply, so there is little incentive for suppliers to charge significantly below the buy-out price. You would end up in a situation where the cost that being passed through to airlines, and therefore to consumers, is disproportionate to the decarbonisation that happens.

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Alice Macdonald (Labour)

Q You have all mentioned how essential SAF is to decarbonisation. Could you expand on its environmental impact? When and how will you be able to track the impact of the mechanism on your emissions? How will you directly be able to link it, or SAF more broadly, to any reduction in emissions?

Luke Ervine: In 2023, Virgin Atlantic ran the first ever 100% SAF transatlantic flight, and we did a lot of studies in addition to those on the carbon benefits. We worked with Imperial College and the University of Sheffield, and—to back up Jonathon’s point—the particulate emissions from that SAF were 40% lower than from traditional jet fuel. That has a direct correlation with the number of contrails that it can form. More studies need to be done, as Jonathon says, but there is a very direct correlation between particulate and contrail formation—and SAF provides that benefit. On Jonathon’s point, 2G SAF is better environmentally and sustainably than 1G. The UK Government have done a great job in creating a GHG-based mandate, which will reward lower carbon intensity SAF—and that can be monetised, as well. In producing those 2G SAFs, we can kick-start a very unique pot of SAF that has better environmental attributes and can drive better value for money for us and therefore consumers.

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Paul Kohler (Liberal Democrat)

The EU ETS first established that the key principle is that money is recycled to help decarbonisation of those sectors that fund it. It is not taxpayers’ money. Aviation puts £500 million into the UK emissions trading scheme. That money is supposed to come back to support the decarbonisation of aviation. None of it does. All we are saying is, is that not a perfect opportunity to use some of that aviation money to support the costs that are coming back to us through the levy? Then we would not be paying twice. Instead, we would be paying for the levy, but through the UK emissions trading scheme.

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10:29 Paul Kohler (Liberal Democrat)

Luke Ervine: Just to add and clarify, I think Luke Taylor asked a question earlier about ways to pay for the SAF mandate. We have always been very clear about paying twice through things such as the ETS scheme. We would love to see those revenues used to reinvest in the decarbonisation of the aviation industry. Given the economic value it returns and the Government’s growth agenda, we believe that creating a SAF industry also creates jobs and a lot of economic prosperity. The Sustainable Aviation report in 2023 estimated that the UK SAF industry would create about 60,000 new jobs by 2050 and about £10 billion gross value added by the same time. There is a benefit here for the UK economy as a whole purely in terms of the SAF industry, and using some of the taxes we currently pay to fund the RCM would be very helpful.

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10:33 Lewis Atkinson (Labour)

Lahiru Ranasinghe: To add to that, it would also enable UK aviation to grow. Our estimates are that each aircraft based in the UK supports around 400 jobs and £27 million of GVA. We have over 150 aircraft in the UK as it is, we have three aircraft going to a new base in Newcastle shortly and we absolutely intend to continue with the growth in the UK. By having the RCM unlock SAF production and SAF supply, that opens the doors to us to continue growing, while also decarbonising. That is a massive part of the economic benefit that the RCM helps to unlock, beyond the obvious effects of supporting jobs and production on the ground in the SAF industry.

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10:39 Luke Taylor (Liberal Democrat)

On renewable energy, last year the Sustainable Aviation road map made it quite clear that 3G SAF—where you basically electrolyse water to get hydrogen and you capture CO 2 from the atmosphere—is going to take a lot of renewable electricity. We are going to need a lot more of that within the UK if we are going to support a domestic power-to-liquid market.

Luke Ervine: In addition to that, we need to think about other areas of SAF, when we talk about SAF having a nominal value associated with its ability to reduce greenhouse gases. We are working alongside the Department for Energy Security and Net Zero and the Department for Business and Trade to understand how carbon can form part of the solution, and decarbonising the SAF that we are producing is also key. We are also working side by side with the Treasury to understand what the revenues from the ETS look like.

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Graeme Downie (Labour)

What I will say is that corporates have gone gangbusters—if I can use that technical term—on SAF, and we do something called SAF Scope 3. A lot of the big corporates set very ambitious net zero targets by 2030, particularly professional services firms such as consulting firms, banks and law firms. When they do their carbon footprinting, a huge proportion is from their flying activity, so they come to us and say, “I want to address my carbon emissions”, and we can offer them SAF. We can sell the carbon attributes as what they call a Scope 3, and that has literally taken off. Most of the SAF that we bought last year came with a SAF Scope 3 deal from a corporate. That is fantastic, because we can use that revenue to reinvest and buy more SAF. From a corporate market, there is definitely very good acceptance of the power of SAF to reduce our emissions.

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10:47 Luke Taylor (Liberal Democrat)

Jonathon Counsell: I will answer the risk question. Yes, without the policy, we have no 2G SAF, so we would be dependent on the 1G market, which will cap out in the early 2030s. We are not going to achieve our decarbonisation targets without 2G SAF. That is the biggest risk without the Bill.

The biggest risk with the Bill is buy-out. If the incentive does not produce enough SAF—we understand the buy-out is there to manage short-term supply shortages, but if we have long-term buy-out, which we have seen in the ground transport fuels market—that is policy failure. Essentially, that huge cost is £6,000 per tonne of SAF, and if that cost comes straight back to the airline, it will go on air fares, but you do not get any decarbonisation—you get huge cost and no decarbonisation. That is our biggest risk.

I would not say SAF is popular—that is probably going a step too far. It is fair to say there is greater acceptance of SAF as a solution, but let us be clear: nobody wants to pay for it. However, we accept that there is a cost to the net zero transition, and our job is to minimise that cost as far as possible.

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10:54 Greg Smith (Conservative)

However, in our case, because we are using the FT-SPK route, biogenic CO2 is produced in the process. If I capture that CO2 and connect to Net Zero Teesside, I will be able to generate more carbon certificates—actually, it is triple. For example, if I produced 100 carbon certificates without carbon capture, with carbon capture I can produce 300. By this process, we can reduce the cost of SAF to the offtaker or to the consumer, because then I will divide the capex with the overall cost; instead of dividing it by 100, I will divide it by 300. In our case and for our route, it is key to be connected to the carbon cluster in Teesside, because then I will be able to provide a lower cost for these carbon certificates, if we get the RCM potential.

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11:04 Luke Taylor (Liberal Democrat)

Noaman Al Adhami: From our perspective, the route we are using—the Fischer-Tropsch synthetic paraffinic kerosene route—is an American Society for Testing and Materials route that is approved already. On sustainability, the feedstock criteria are well defined in the SAF mandate. All the types of feedstock that are eligible to produce SAF are well defined. We are complying with that. The greenhouse gas and carbon intensity are other factors for measuring sustainability. For our project, without carbon capture, we are at minus 80% or minus 85% from the fossil equivalent. With carbon capture, we will go negative—we will go to even more than minus 200%. That is key for us.

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11:16 David Reed (Conservative)

Q That is a very good answer; I am happy with that, and it is obviously coming from a company’s perspective. In terms of Government engagement, how many conversations have been had with the Cabinet Office and the Department for Energy Security and Net Zero around energy security and your production capability?

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11:18 Tom Collins (Labour)

Noaman Al Adhami: In terms of standards, as I mentioned before, our route is approved as per the ASTM route. The rest of the standards—mainly on feedstock—are already there in the SAF mandate with all the details, and we are complying with that. I think one of the big advantages of SAF, compared with other means of decarbonising aviation, is that it is a drop-in fuel. It is a liquid fuel, very similar to the jet fuel kerosene, so it is easy to store and transport; you can use existing pipelines.

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