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What is a DNO?

What is a DNO?

A DNO, or Distribution Network Operator, is a company responsible for managing and maintaining the distribution network for electricity supply in a specific geographic area. In the UK, there are several DNOs, each covering a distinct region.

These companies are tasked with operating and maintaining the infrastructure, such as substations, transformers, and power lines, that deliver electricity from the national grid to homes, businesses, and other consumers within their designated area.

DNOs also handle tasks like connecting new properties to the electricity network, managing power outages, and ensuring the overall reliability and safety of the electricity distribution system.

Which DNOs cover the UK?

In the United Kingdom, there are several Distribution Network Operators (DNOs), each responsible for specific regions:

  1. UK Power Networks: Covers London, the South East, and the East of England.
  2. Western Power Distribution: Operates in the Midlands, South West England, and South Wales.
  3. Northern Powergrid: Manages the electricity distribution network in the North East, Yorkshire, and northern Lincolnshire.
  4. Scottish and Southern Electricity Networks (SSEN): Serves customers in central southern England and the north of Scotland.
  5. ScottishPower Energy Networks: Covers areas of Scotland, North Wales, and parts of England.

These DNOs play a crucial role in ensuring the reliable supply of electricity to homes and businesses within their respective regions.

Who Regulates UK DNOs?

In the United Kingdom, Distribution Network Operators (DNOs) are regulated by the Office of Gas and Electricity Markets (Ofgem).

Ofgem is the regulator for the electricity and gas markets in Great Britain, responsible for ensuring that DNOs operate efficiently, maintain high standards of service, and comply with relevant regulations and obligations. They oversee various aspects of DNO operations, including investment planning, network maintenance, customer service, and pricing.

Ofgem’s role is essential in promoting competition, protecting consumer interests, and maintaining the integrity and reliability of the electricity distribution network.

How do I know who my DNO is?

To determine your Distribution Network Operator (DNO) in the UK, you can use an online postcode checker provided by various energy industry websites or directly through the websites of the DNOs themselves.

Alternatively, you can find the information on your electricity bill or contact your electricity supplier, who can provide details about your DNO based on your location. It’s essential to know your DNO for any inquiries related to your electricity supply, such as power cuts, new connections, or upgrades to your electrical service.

Picture of Jamie Morgan MIET

Jamie Morgan MIET

Jamie Morgan is a highly experienced Electrical Engineer and the Managing Director of ESI: Electrical Safety Inspections.

With a strong background in electrical compliance, safety testing, and consultancy, Jamie specialises in electrical consultancy, EICRs, validation surveys, and power quality assessments. Passionate about electrical safety and innovation, he shares expert insights on workplace compliance, energy efficiency, and emerging industry trends.

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