Question to the Department for Transport:

To ask His Majesty's Government what evidence they used in the development of the Jet Zero strategy; and in gathering any such evidence, what assessment they made of the risk that sustainable aviation fuels may not have a significant impact on reducing carbon emissions in the medium term.

The Jet Zero Strategy was developed considering a wide range of evidence including over 1,500 responses to the Jet Zero Consultation, launched in July 2021, and the Jet Zero: Further Technical Consultation which was published in March 2022. We received consultation responses from members of the public, and a broad spectrum of organisations including from the aviation and aerospace industries, NGOs and environmental groups.

Alongside consultation responses, we considered external evidence produced domestically and internationally, including from the UK Climate Change Committee, the World Economic Forum, the International Council on Clean Transportation, the European Union, the United States and the International Civil Aviation Organization.

This evidence informed policy development, as well as the modelling of four scenarios each with a different mix of technologies to illustrate alternative pathways for reaching net zero aviation by 2050. Within these scenarios, sustainable aviation fuels (SAF) account for up to 10% emissions reductions in 2030, and up to 32% in 2040, demonstrating the potential impact of SAF in the medium-term. The range of scenarios modelled aims to reflect the range of potential outcomes, recognising the current early stages of development of new fuels and technologies.

To support the development of a UK SAF industry, through the Jet Zero Strategy we committed to putting a SAF mandate in place with a target of at least 10% SAF in the UK jet fuel mix by 2030; and having at least five UK SAF plants under construction, supported through our £165 million advanced fuel competition.

The nascent nature of decarbonisation technologies means that we do not yet know the optimal technological mix for achieving Jet Zero. We have therefore committed to reviewing our approach every five years and adapting our Strategy if necessary.