Question to the Department for Transport:

To ask His Majesty's Government what percentage of aviation fuel is sourced from sustainable sources in the United Kingdom; and what are the most common sources from which this fuel is produced.

The sustainable aviation fuel (SAF) Mandate – which came into effect at the start of this year - is the UK’s key policy to decarbonise jet fuel. It obligates the supply of an increasing amount of SAF in the overall UK aviation fuel mix; starting at 2% in 2025, reaching 15% in 2035 and 22% in 2040. Targets beyond 2040 will remain at the same level (22%) but will be kept under review – and can be increased as the market develops.

The UK is already making significant progress in the supply of SAF. 97 million litres of SAF were supplied in 2023, equivalent to 77 kilotonnes or 0.7% of all jet fuel supplied in the UK that year, and double the amount in the previous year. In 2023, 99.6% (96.3 million litres) of SAF was from used cooking oil and 0.4% (0.3 million litres) was from food waste.