Question to the Department for Transport:

To ask the Secretary of State for Transport, pursuant to the Answer of 27 October 2025 to Question 82986 on Aviation: Alternative Fuels, how many UK-based sustainable aviation fuel production facilities have (a) commenced construction and (b) reached final investment decision.

The only commercial scale SAF producer in the UK is P66’s Humberside Refinery. Through the Advanced Fuels Fund (AFF) we have awarded over £198m to 21 UK SAF projects. Information on these projects is published on gov.uk.

There are a wide range of SAF projects across the UK using different technologies and at different stages of development. However, much of the information on the development of fuel projects that DfT holds is commercially sensitive.

Our policies are both ambitious and pragmatic to the realities of the SAF industry. The SAF Mandate entered into force on 1 January 2025. In its first year, the mandate requires that SAF constitute 2% of total fossil jet fuel supplied, increasing to 10% by 2030 and 22% by 2040. Provisional data suggests the UK was already on track, with SAF accounting for approximately 2% of aviation fuel supplied in 2024.

On the supply side, we are creating the right environment to support the future construction of UK SAF production plants through measures such as the UK’s pioneering SAF Clearing House, AFF, and legislation to provide investor confidence via a Revenue Certainty Mechanism.