Question to the Department for Business, Energy and Industrial Strategy:

To ask the Secretary of State for Business, Energy and Industrial Strategy, what estimate he has made of the number and proportion of households that receive their heating from heat network systems in the latest period for which data is available.

The most recently available experimental statistics on heat networks were published in March 2018, when there were 439,549 households that received their heating from heat network systems: https://www.gov.uk/government/publications/energy-trends-march-2018-special-feature-article-experimental-statistics-on-heat-networks

ONS statistics showed that there were 27.6 million households in the UK in 2018.

Therefore, in 2018 approximately 1.6% of households received their heating from heat network systems.