The update on SAF, including the Call for Evidence on SAF supply and industry certainty, was published on 16 June. The Call for Evidence closed on 28 July. Officials are currently reviewing the evidence provided by stakeholders across the industry. Our intention is to publish a government response in the Autumn, subject to the usual approval processes.

The UK and EU are currently in negotiations to pursue the linking of the UK Emissions Trading Scheme (UK ETS) and the EU Emissions Trading System (EU ETS). We are working to negotiate a good deal in line with UK interests as quickly as possible. Separately, on 23 March 2026, the UK ETS Authority launched a consultation on the treatment of SAF in the UK ETS, considering the introduction of, and interactions with, the SAF Mandate. This consultation closed on 15 June 2026, and we are considering the responses alongside the UK-EU ETS linking negotiations.

Projects applying to and funded through the Advanced Fuels Fund were at various stages of development and would not necessarily have secured a location for project development and construction. There were successful projects with proposed plant locations (at the time of application) in England, Scotland and Wales across the three funding windows, with around £159m, £3.5m and £31.5m awarded respectively. The remaining allocations were made to projects with locations to be confirmed later in their development phase. Between 2022-2026, the AFF received around 75 applications.

The Low Carbon Fuels Fund will support SAF production across the UK by providing up to £219m for projects through to 2029/30. No funds have been allocated to date, as the scheme’s first application window will close on 21 September 2026. This funding will build on the work of the Advanced Fuels Fund, which allocated over £198m to support private investment in 21 UK SAF projects between 2022 and 2026. We are unable to comment on the locations of unsuccessful applications due to ongoing commercial sensitivities.

Projects applying to and funded through the Advanced Fuels Fund were at various stages of development and would not necessarily have secured a location for project development and construction. There were successful projects with proposed plant locations (at the time of application) in England, Scotland and Wales across the three funding windows, with around £159m, £3.5m and £31.5m awarded respectively. The remaining allocations were made to projects with locations to be confirmed later in their development phase. Between 2022-2026, the AFF received around 75 applications.

The Low Carbon Fuels Fund will support SAF production across the UK by providing up to £219m for projects through to 2029/30. No funds have been allocated to date, as the scheme’s first application window will close on 21 September 2026. This funding will build on the work of the Advanced Fuels Fund, which allocated over £198m to support private investment in 21 UK SAF projects between 2022 and 2026. We are unable to comment on the locations of unsuccessful applications due to ongoing commercial sensitivities.

The Call for Evidence on SAF supply and industry certainty closed on 28 July. Officials are currently reviewing the evidence and we will provide a government response in due course.

The Secretary of State for Transport has not had discussions with advanced e-SAF producers on the Sustainable Aviation Fuel (SAF) Mandate call for evidence titled “SAF Mandate: SAF supply and industry certainty in an evolving market”, launched on 16 June. Officials hosted an open webinar on 18 June which was attended by a broad range of stakeholders from across the SAF industry. In addition to this, Officials have held three workshops on the contents of the call for evidence. Stakeholders from across the industry were invited, including e-SAF producers.

Government published a call for evidence on crop-derived SAF in December 2025. We requested feedback on the benefits and risks of using crops, including the impact on food security and land use change. Officials are currently reviewing the evidence and we will provide a government response in due course.

The assumptions used in the Sustainable Aviation Fuel (SAF) Mandate cost-benefit analysis are projections of future SAF production costs over the appraisal period, rather than observed market prices. These estimates are subject to uncertainty regarding future technology deployment, feedstock availability and market developments. This is covered in detail in the SAF Mandate cost-benefit analysis. At present, hydroprocessed esters and fatty acids (HEFA) fuel is the only SAF pathway with a sufficiently mature and established market from which viable commercial price data are available. Other SAF pathways are not yet deployed at a scale that enables meaningful comparisons against the assumptions used in the cost-benefit analysis. Based on available market data, while SAF prices are inherently volatile and can fluctuate over time in either direction, we are confident that the range of estimates for HEFA SAF in the cost-benefit analysis remains accurate.

The Sustainable Aviation Fuel (SAF) Mandate cost benefit analysis estimated the potential impact that SAF Mandate compliance costs could have on UK aviation demand. There was not a specific assessment of the demand impact on outbound leisure travel, or the impact on package holiday prices, as this will be dependent on how individual airlines and package holiday providers choose to pass on any costs.

As part of the Sustainable Aviation Fuel (SAF) Mandate cost-benefit analysis, the total cost of compliance was estimated by looking at the additional cost of supplying SAF compared to kerosene, as well as the change to any carbon price obligation that applies.

A high-level assessment of the additional administrative costs which may be faced by fuel suppliers when complying with the SAF Mandate was included in the non-monetised costs in section 4.

Question 12526 was answered on 1 July 2026.

The Sustainable Aviation Fuel (SAF) Mandate cost-benefit analysis set out the estimates of the impact on an average one-way ticket price (Sustainable aviation fuel mandate: final stage cost benefit analysis). This analysis assumes that airlines pass on 75% of the additional costs of the SAF Mandate onto consumers. The year-on-year costs for different ticket-types was not part of the cost-benefit analysis, as this will be dependent on how individual airlines choose to distribute additional costs.

Eligibility criteria for the Low Carbon Fuels Fund will be provided in the guidance for applicants, which will be released upon the launch of the competition this summer. In the previous Advanced Fuels Fund competition, eligibility criteria included the categories of main fuel output, technology readiness level, feedstocks, greenhouse gas emissions, location, project lead and grant offer terms and conditions.

The Sustainable Aviation Fuel (SAF) Mandate cost-benefit analysis set out the estimates of the impact on an average one-way ticket price (Sustainable aviation fuel mandate: final stage cost benefit analysis). This analysis assumes that airlines pass on 75% of the additional costs of the SAF Mandate onto consumers. The year-on-year costs for different ticket-types was not part of the cost-benefit analysis, as this will be dependent on how individual airlines choose to distribute additional costs.

Eligibility criteria for the Low Carbon Fuels Fund will be provided in the guidance for applicants, which will be released upon the launch of the competition this summer. In the previous Advanced Fuels Fund competition, eligibility criteria included the categories of main fuel output, technology readiness level, feedstocks, greenhouse gas emissions, location, project lead and grant offer terms and conditions.

The latest SAF Mandate 2025 provisional statistical release was published on 13 May 2026. These provisional statistics show that, in 2025, over 2% of all reported aviation fuel supply was verified and unverified SAF. Whilst these statistics are provisional, and it is too early to assess levels of supply in 2030, they show a continued increasing trend of SAF supply growing in the UK. Final statistics for 2025 will be published in November.

As previously stated, an assessment of the costs of SAF policies and the impact on air fares was conducted as part of the published SAF Mandate cost-benefit analysis.

The SAF Mandate is designed to protect against excessive costs being passed on to passengers with a buyout option for obligated suppliers, with a built-in review process so the Government can take action if necessary. How airlines choose to pass on costs to passengers will be a commercial decision for each airline. As such, it is not possible to predict how individual airlines will choose to do this or the impacts this will have on UK outbound travel routes.

The high-level assessment criteria for the Low Carbon Fuels Fund will be released in the guidance to applicants when the competition window launches this summer.

High-level scoring criteria for the Low Carbon Fuels Fund will be provided in the guidance for applicants upon the launch of the competition. However, weightings of these scoring criteria are not released in order to maintain a competitive bidding process. Carbon savings, value for money, UK job creation, regional economic growth and energy security are important aspects of UK sustainable aviation fuel (SAF) projects and are relevant to the objectives of the scheme. In particular, carbon savings against traditional jet fuel is a key characteristic of SAF, and value for money (including job creation) is critical to ensuring management of public funds. The high-level scoring criteria for the Advanced Fuels Fund included the categories: project relevance, technical approach (including greenhouse gas emissions), commercial approach and project implementation.

Applicants to the Low Carbon Fuels Fund will be assessed through a competitive process, scored against set and weighted assessment criteria. High-level scoring criteria will be released in the guidance to applicants upon the launch of the competition this summer. Jobs, supply chains, and economic growth in the UK are all important aspects of UK SAF projects relevant to the objectives of the scheme.

We do not publish data on the country in which Sustainable Aviation Fuel (SAF) supplied to the UK was produced. Our SAF mandate statistical series does however present data on the country of feedstock origin of fuel supplied. The link to the latest provisional tables can be found on the SAF Mandate statistics collection pages. Final data for the 2025 SAF Mandate obligation year will be published in November 2026.