Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, how many homes his Department has identified as requiring an upgrade from single-phase to triple-phase electricity supply, in the context of the criteria for being a zero-carbon household.

My Department does not hold this data, however only a small minority of homes are likely to need an upgrade from a single to three-phase connection to accommodate multiple or higher-powered low carbon technologies.