Question to the Cabinet Office:

To ask His Majesty's Government what estimate they have made of the number of deaths related to climate change in each county in England.

The information requested falls under the remit of the UK Statistics Authority.

Please see the letter attached from the Permanent Secretary at the Office for National Statistics (ONS).

Lord Foster of Bath

House of Lords

London

SW1A 0PW

04 February 2026

Dear Lord Foster,

As Permanent Secretary of the Office for National Statistics (ONS), I am responding to your Parliamentary Question asking what estimate has been made of the number of deaths related to climate change in each county in England (HL14056).

The ONS published Climate-related mortality, England and Wales: 1988 to 20221 in 2023. This release used climate and mortality data from 1988 to 2022 to analyse temperature-related mortality in England and Wales. The analysis estimates the relative risk, numbers and rates of death per 100,000 population associated with changing temperatures, based on a statistical model. Publication of updated estimates based on an enhanced statistical model and including data up to 2025 is provisionally planned for mid-2026.

Data is available for each English region and for Wales. However, data is not available by individual county in England.

Yours sincerely,

Darren Tierney