Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what was the average duration of an unplanned power outage in each Distribution Network Operator area in each of the last five years.

The UK has a highly resilient energy network, and industry works to continuously minimise the risk and impacts of unplanned outages.

All DNOs are regulated by the independent regulator, Ofgem, and must report their performance against annual targets to Ofgem each year. The outcomes of these reports are published on Ofgem’s website: RIIO-2 Electricity Distribution: annual report 2024 to 2025 | Ofgem

Ofgem’s most recent RIIO-2 Electricity Distribution report found that most companies improved their customer disruption scores between 2024 and 2025.