UK Power Cuts & DNO Grids

Understanding the UK Electricity Grid & Your 7 DNO Operators

Electricity across Great Britain and Northern Ireland flows from offshore wind farms, nuclear stations and gas interconnectors managed at transmission voltage by NESO (National Energy System Operator) down into local substations and street-level feeders run by Distribution Network Operators (DNOs) plus Independent DNOs (IDNOs) serving newer housing estates. Whether your supplier bill comes from Octopus Energy, British Gas, EDF, E.ON Next, OVO or ScottishPower, physical line repairs belong exclusively to the DNO licensed for your outward postcode:

• UK Power Networks (UKPN): London (LPN), East of England (EPN) and South East England (SPN).
• National Grid Electricity Distribution (NGED): West Midlands, East Midlands, South West England and South Wales.
• Scottish and Southern Electricity Networks (SSEN): Central Southern England (SEPD) and Scottish Hydro / North Scotland (SHEPD).
• Northern Powergrid (NPG): North East England and Yorkshire & North Lincolnshire.
• SP Electricity North West (ENWL): Greater Manchester, Lancashire and Cumbria.
• SP Energy Networks (SPEN): Central & Southern Scotland, Merseyside, Cheshire and North Wales.
• NIE Networks: Northern Ireland electricity distribution grid.

Life Safety, 105 Emergency Number & Ofgem £95 Compensation Rules

If your whole street loses supply or you spot damaged overhead cables, dial 105 free from any UK landline or mobile to connect immediately with your regional DNO fault desk (never approach fallen power lines — stay well clear because reclosers can automatically re-energise conductors). Households containing older residents, young children under 5, or anyone relying on medical devices such as oxygen concentrators, stairlifts or dialysis pumps should register free on their DNO’s Priority Services Register (PSR).

Under Ofgem Guaranteed Standards of Performance, during normal weather conditions an unplanned power cut lasting 12 hours or longer in Great Britain entitles domestic customers to an automatic £95 payment plus £40 for each additional 6 hours (higher severe storm thresholds apply after 24–48 hours depending on storm category, capped at £2,000, with comparable rules by the Utility Regulator in Northern Ireland).

UK Postcode Granularity & Consumer Remedies

DNO Licence Areas & Outward Postcode Mapping: Unlike your energy billing retailer (Octopus, British Gas, EDF, E.ON Next, OVO), physical overhead cables and underground substations across Great Britain and Northern Ireland are repaired strictly by your geographic Distribution Network Operator (DNO). Entering a 2–4 character outward postcode (such as SW1A, M1, B60, EH1, CF10 or BT1) immediately identifies the responsible DNO and active feeder faults.

Use UKOutage tools alongside live feeds: check your operator with Who Is My DNO?, verify mobile host networks on Which Network?, run our UK Speed Test, or calculate statutory claims using the Ofgem Power Cut Calculator and Ofcom Broadband Calculator.