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Written question asked by Adrian Ramsay (Green Party) on Monday, 21 July 2025, in the House of Commons. It was due for an answer on Monday, 1 September 2025. It was answered by Kerry McCarthy (Labour) on Thursday, 4 September 2025 on behalf of the Department for Energy Security and Net Zero.

Fuels: Greenhouse Gas Emissions

Question

To ask the Secretary of State for Energy Security and Net Zero, with reference to the research entitled Greenhouse gas reporting: conversion factors 2024, published on 8 July 2024, if he will review his Department's conversion factors for (a) fuels and (b) well-to-tank fuels.

Answer

A proportionate risk-based approach is taken to reviewing and updating conversion factors, considering size of UK emission among other factors. As part of the annual peer review process, priority improvements for each year are advised by a Steering Group, consisting of Government officials, consultants and other key data providers. The Steering Group collate feedback and identify potential improvements from regular users of Conversion Factors from across industry and academia.

The conversion factors for fuels and well-to-tank fuels have been reviewed since 2015. All changes to direct and well-to-tank conversion factors for fuels and bioenergy in each year are available from the collection webpage. Conversion factors for natural gas, diesel, petrol and coal are updated regularly, including in the 2024 publication.

Secondary information

Type
Written question
Reference
69532
Session
2024-26
Related items
Biofuels
Monday, 8 September 2025
Written questions
House of Commons
Grouped for answer
Yes
Subjects
Fuels Greenhouse gas emissions
Contains statistics
Yes
Link
View this Written question on www.parliament.uk