To ask the Secretary of State for Transport, what estimate her Department has made of the number of passenger flights in the UK using sustainable aviation fuel in 2023-24.

The Department does not require, and has no plans to require, data from commercial operators on the number of passenger flights using sustainable aviation fuel (SAF). It has set ambitious but realistic targets for SAF supply through a SAF mandate scheme introduced on 1 January 2025 and against which progress is being measured.

The uptake of SAF was previously supported through the Renewable Transport Fuel Obligation (RTFO) scheme. In 2023 97 million litres of SAF was supplied under the RTFO, the equivalent of 0.7% of all jet fuel supplied in the UK that year. Progress towards targets set through the SAF mandate will similarly be reported in the Department’s renewable fuels statistics.