Northern Electric was an electricity supply and distribution company serving north east England.
Scottish Power Limited, trading as ScottishPower, is a vertically integrated energy company based in Glasgow, Scotland. It is a subsidiary of Spanish utility firm Iberdrola.
The National Grid is the high-voltage electric power transmission network supporting the UK's electricity market, connecting power stations and major substations, and ensuring that electricity generated anywhere on the grid can be used to satisfy demand elsewhere. The network serves the majority of Great Britain and some of the surrounding islands. It does not cover Northern Ireland, which is part of the Irish single electricity market.
United Utilities Group plc (UU) is the United Kingdom's largest listed water company. It was founded in 1995 as a result of the merger of North West Water and NORWEB. The group manages the regulated water and waste water network in North West England, which includes Cumbria, Greater Manchester, Lancashire, Merseyside, most of Cheshire and a small area of Derbyshire, which have a combined population of more than seven million.
The Office of Gas and Electricity Markets (Ofgem), supporting the Gas and Electricity Markets Authority, is the government regulator for the electricity and downstream natural gas markets in Great Britain. It was formed by the merger of the Office of Electricity Regulation (OFFER) and Office of Gas Supply (Ofgas).
Phoenix Natural Gas is the largest gas distribution business in Northern Ireland, being the owner and operator of the licence for the distribution network in the Greater Belfast area. The distribution business is responsible for the development of the pipeline network and also for providing a 24/7 operational and transportation service platform to suppliers under the rules of the company's network code. The ongoing investment within the Phoenix Natural Gas licence area does not attract any grant or support from local or UK government. The investment is a standalone private venture.
National Grid plc is a British multinational electricity and gas utility company headquartered in London, England. Its principal activities are in the United Kingdom, where it owns and operates electricity and natural gas transmission networks, and in the Northeastern United States, where as well as operating transmission networks, the company produces and supplies electricity and gas, providing both to customers in New York and Massachusetts.
Good Energy Group PLC is a British energy company based in Chippenham, Wiltshire that provides services in the electrification of transport and decentralised renewable energy generation such as domestic solar panels. The company is also an energy retailer, and built a portfolio of wind and solar generation which was sold in 2022. Founded by Juliet Davenport, its CEO is Nigel Pocklington.
E.ON UK is a British energy company and one of the largest suppliers of energy in the UK, following its acquisition of Npower. It is a subsidiary of E.ON of Germany and one of the Big Six energy suppliers. It was founded in 1989 as Powergen, and was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index. It has been a subsidiary of E.ON since 1 July 2002.
Eastern Electricity plc was an electricity supply and distribution utility serving Eastern England, including East Anglia and part of Greater London. It was renamed Eastern Group under which name it was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index until it was acquired by Hanson plc in 1995, before being purchased by Texas Utilities in 1998.
Npower Limited was a British supplier of gas and electricity to businesses. It has been a subsidiary of E.ON UK since January 2019. The company was formerly known as Innogy plc and was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index.
British Gas is an energy and home services provider in the United Kingdom. It is the trading name of British Gas Services Limited and British Gas New Heating Limited, both subsidiaries of Centrica. Serving around ten million homes in the United Kingdom, British Gas was the largest energy supplier in the country until 2024 when it was overtaken by Octopus Energy. It remains the largest gas supplier. It is considered one of the Big Six dominating the gas and electricity market in the United Kingdom.
SSE plc is a multinational energy company headquartered in Perth, Scotland. It is listed on the London Stock Exchange, and is a constituent of the FTSE 100 Index. SSE operates in the United Kingdom and Ireland.
In the United Kingdom, an electricity supplier is a retailer of electricity. For each supply point the supplier has to pay the various costs of transmission, distribution, meter operation, data collection, tax etc. The supplier then adds in energy costs and the supplier's own charge. Regulation of the charging of customers is covered by the industry regulator Ofgem.
The United Kingdom's National Transmission System (NTS) is the network of gas pipelines that supply gas to about forty power stations and large industrial users from natural gas terminals situated on the coast, and to gas distribution companies that supply commercial and domestic users. It covers Great Britain, i.e. England, Wales and Scotland.
Electricity North West Limited is a British electricity distribution network operator, responsible for the administration and maintenance of the network, that distributes electricity to much of North West England.
UK Power Networks (UKPN) is a distribution network operator for electricity covering South East England, the East of England and London. It manages three licensed distribution networks which together cover an area of 30000 square kilometres and approximately eight million customers.
Basil Scarsella is an Italo-Australian businessman. He is a former CEO of ETSA Utilities and Northern Gas Networks. He is the current CEO of UK Power Networks, formerly EDF Energy Networks. He was also president of the Oceania Football Confederation between 2000 and 2003, and is a former member of the executive committee of FIFA.
The Electricity Act 1989 provided for the privatisation of the electricity supply industry in Great Britain, by replacing the Central Electricity Generating Board in England and Wales and by restructuring the South of Scotland Electricity Board and the North of Scotland Hydro-Electric Board. The Act also established a licensing regime and a regulator for the industry called the Office of Electricity Regulation (OFFER), which has since become the Office of Gas and Electricity Markets (OFGEM).
The Big Six were the United Kingdom's largest retail suppliers of gas and electricity, who dominated the market following liberalisation in the late 1990s. By 2002, six companies – British Gas, EDF Energy, E.ON, RWE npower, Scottish Power and SSE – had emerged from the 15 former incumbent monopoly suppliers.
