Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what recent estimate his Department has made of the carbon savings achieved by connecting buildings to district heating networks, such as the Mersey Heat network in Liverpool.

The Government's assessment of carbon emission savings associated with various policies is set out in its Carbon Budget Growth and Delivery Plan, most recently published in October 2025.

The policies specifically associated with heat networks are estimated to save 3.02 MtCO2e per annum on average over Carbon Budget 6, which is the 5-year period from 2033 to 2037.

Heat networks will also be expected to contribute to emissions savings from other policies aimed at decarbonising heat and buildings.