Written question asked by Alex Mayer (Labour) on Thursday, 17 July 2025, in the House of Commons. It was due for an answer on Monday, 21 July 2025. It was answered by Justin Madders (Labour) on Thursday, 24 July 2025 on behalf of the Department for Business and Trade.

Summertime: Carbon Emissions

Question: To ask the Secretary of State for Business and Trade, whether his Department has made a recent assessment of the potential impact of moving to (a) single and (b) double summer time on cumulative carbon emissions.

Answer: The Government believes the current daylight-saving arrangements represent the optimal use of the available daylight across the UK. Therefore, we have no plans to introduce single summertime, double summertime, or other such changes. Since the Government does not intend to make changes to the existing system, we have not conducted a recent assessment of the impact on cumulative carbon emissions. The Government is fully committed to complying with the statutory duties outlined in the Climate Change Act and reaching net zero by 2050.

Secondary information