The 2003 London blackout was a serious power outage that affected parts of south London and north-west Kent in the evening of 28 August 2003. It was caused by a series of faults at National Grid transmission substations, which supplied the distribution network operator in the area, EDF Energy.
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 serving Great Britain, 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.
Tenaga Nasional Berhad, also known as Tenaga Nasional or simply Tenaga, is the Malaysian multinational electric company and is the only electric utility company in Peninsular Malaysia and also the largest publicly listed power company in Southeast Asia with MYR 182.60 billion worth of assets. It serves over 10.3 million customers throughout Peninsular Malaysia and the East Malaysian state of Sabah through Sabah Electricity.
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.
E.ON SE is a German multinational electric utility company based in Essen, Germany. It operates as one of the world's largest investor-owned electric utility service providers. The name originates from the Latin word aeon, derived from the Greek αἰών aion, which means age or "infinity", with the period being added to create secondary meanings of "energy" (E) and "illumination" (ON). The company is a component of the Euro Stoxx 50 stock market index, DAX stock index and a member of the Dow Jones Global Titans 50 index.
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.
Public electricity suppliers (PES) were the fourteen electricity companies created in Great Britain when the electricity market in the United Kingdom was privatised following the Electricity Act 1989. The Utilities Act 2000 subsequently split these companies between distribution network operators and separate supply companies.
Western Power Distribution is a trade name formerly used by four electricity distribution companies in the United Kingdom: WPD South West, WPD South Wales and WPD Midlands. Each company was the distribution network operator for its respective region. Western Power Distribution, which had headquarters in Bristol, served approximately 7.7 million customers in its combined distribution areas. In 2022 the company was absorbed into its new parent company, National Grid.
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.
Southern Electric plc was a public limited energy company in the United Kingdom between 1990 and 1998, when it merged with Scottish Hydro-Electric plc to form Scottish and Southern Energy plc. The company had its origins in the southern England region of the British nationalised electricity industry. Created in 1948 as the Southern Electricity Board, in 1990 it was privatised by being floated on the London Stock Exchange.
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.
SP Manweb is the regional electricity distribution network operator (DNO) for Merseyside, North Wales and parts of Cheshire. It is now part of SP Energy Networks, itself a subsidiary of the Spanish energy company Iberdrola.
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.
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.
Northern Gas Networks Limited is the British company responsible for distributing gas to homes and businesses across Yorkshire, the North East and northern Cumbria, England. Northern Gas Networks Limited is one of eight gas distribution networks in the United Kingdom.
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.
Solarplicity Energy Limited was a renewable energy company based in Hertfordshire, England. In August 2019 the company became the 13th energy supplier to collapse since 2018, affecting around 7,500 domestic and 500 business customers.
Scottish and Southern Electricity Networks is one of two energy companies in the UK to be involved both in electricity transmission and distribution.
