Sustainable Aviation Fuel Bill

David Davis Excerpts

2nd reading
Wednesday 11th June 2025 Commons Chamber

[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.