Scottish Power Limited,
trading as
A trade name, trading name, or business name is a pseudonym used by companies that do not operate under their registered company name. The term for this type of alternative name is fictitious business name. Registering the fictitious name with ...
ScottishPower, is a
vertically integrated energy company based in
Glasgow
Glasgow is the Cities of Scotland, most populous city in Scotland, located on the banks of the River Clyde in Strathclyde, west central Scotland. It is the List of cities in the United Kingdom, third-most-populous city in the United Kingdom ...
, Scotland.
It is a subsidiary of Spanish utility firm
Iberdrola
Iberdrola, S.A. () is a Spanish multinational electric utility company based in Bilbao, Spain. It has around 40,000 employees and serves around 30 million customers.
Subsidiary, Subsidiaries include ScottishPower (United Kingdom), Ava ...
.
ScottishPower is the
distribution network operator
A distribution network operator (DNO), also known as a distribution system operator (DSO), is the operator of the electric power distribution system which delivers electricity to most end users. Each country may have many local distribution netwo ...
for
Central and
Southern Scotland,
Merseyside
Merseyside ( ) is a ceremonial counties of England, ceremonial and metropolitan county in North West England. It borders Lancashire to the north, Greater Manchester to the east, Cheshire to the south, the Wales, Welsh county of Flintshire across ...
,
North Wales
North Wales ( ) is a Regions of Wales, region of Wales, encompassing its northernmost areas. It borders mid Wales to the south, England to the east, and the Irish Sea to the north and west. The area is highly mountainous and rural, with Snowdon ...
and parts of
Cheshire
Cheshire ( ) is a Ceremonial counties of England, ceremonial county in North West England. It is bordered by Merseyside to the north-west, Greater Manchester to the north-east, Derbyshire to the east, Staffordshire to the south-east, and Shrop ...
and
Shropshire
Shropshire (; abbreviated SalopAlso used officially as the name of the county from 1974–1980. The demonym for inhabitants of the county "Salopian" derives from this name.) is a Ceremonial counties of England, ceremonial county in the West M ...
. It is also the
transmission owner for the south of Scotland. The company also supplies electricity and
gas
Gas is a state of matter that has neither a fixed volume nor a fixed shape and is a compressible fluid. A ''pure gas'' is made up of individual atoms (e.g. a noble gas like neon) or molecules of either a single type of atom ( elements such as ...
to homes and businesses around the United Kingdom and generates power for supply to the grid. It owned PPM Energy in the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
, which has now been folded into
Avangrid.
History
Foundation
ScottishPower was formed in 1990, in preparation for the
privatisation
Privatization (rendered privatisation in British English) can mean several different things, most commonly referring to moving something from the public sector into the private sector. It is also sometimes used as a synonym for deregulation w ...
of the previously state-owned Scottish electricity industry the following year. Previously the UK government had privatised the English and Welsh electricity industry by splitting the market into 12 regional electricity companies (RECs) and two power generators. However, in Scotland, the industry was already organised on an integrated generation, distribution, and supply basis, and this integration survived the privatisation to become a model for the rest of the United Kingdom. ScottishPower was largely formed from the bigger of the two Scottish electricity boards, the
South of Scotland Electricity Board
The South of Scotland Electricity Board (SSEB) generated, transmitted and distributed electricity throughout the south of Scotland, including the former regions of Strathclyde, Lothian, Fife, Central, Borders and Dumfries and Galloway and a few ...
, whilst the smaller, the
North of Scotland Hydro Board, eventually became part of the
Scottish & Southern Energy Group (the nuclear power stations in Scotland were spun off into a third company,
Scottish Nuclear, which was not sold off with ScottishPower and
Scottish Hydro Electric, but was sold later as part of
British Energy).
MANWEB and Southern Water
ScottishPower was the larger of the two Scottish energy companies and benefited from being both a generator and supplier of power. In 1995 it acquired the
regional electricity company MANWEB, which supplied
Merseyside
Merseyside ( ) is a ceremonial counties of England, ceremonial and metropolitan county in North West England. It borders Lancashire to the north, Greater Manchester to the east, Cheshire to the south, the Wales, Welsh county of Flintshire across ...
, North Wales and parts of
Cheshire
Cheshire ( ) is a Ceremonial counties of England, ceremonial county in North West England. It is bordered by Merseyside to the north-west, Greater Manchester to the north-east, Derbyshire to the east, Staffordshire to the south-east, and Shrop ...
. In 1996 the company diversified into the
water
Water is an inorganic compound with the chemical formula . It is a transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance. It is the main constituent of Earth's hydrosphere and the fluids of all known liv ...
supply business with the purchase of
Southern Water (which was sold again in 2002).
When the supply of energy into British homes was opened up to competition, ScottishPower entered this market, taking market share from the previous gas supply monopoly
British Gas
British Gas (trading as Scottish Gas in Scotland) 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 ...
and also gaining new market share in England and Wales.
Scottish Telecom
ScottishPower established the telecommunications company,
Thus
Thus was a telecommunications provider operating in the United Kingdom based in Glasgow, Scotland. The company was once listed on the London Stock Exchange and became a subsidiary of Cable & Wireless Worldwide (CWW). Following the acquisition o ...
(originally known as Scottish Telecom) and then floated it on the
London Stock Exchange
The London Stock Exchange (LSE) is a stock exchange based in London, England. the total market value of all companies trading on the LSE stood at US$3.42 trillion. Its current premises are situated in Paternoster Square close to St Paul's Cath ...
in 2002.
PacifiCorp
In 2000, ScottishPower completed the acquisition of
PacifiCorp
PacifiCorp is an electric power company based in the Lloyd Center Tower in Portland, Oregon with operations in the western United States.
PacifiCorp has two business units: Pacific Power, a regulated electric utility with service territory thro ...
, which supplies electricity in the western United States, which operates as Pacific Power (in the regulated energy industries of the states of
Oregon
Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...
,
Washington,
California
California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
), and as Rocky Mountain Power (in the regulated energy industries of the states of
Idaho
Idaho ( ) is a landlocked U.S. state, state in the Pacific Northwest and Mountain states, Mountain West subregions of the Western United States. It borders Montana and Wyoming to the east, Nevada and Utah to the south, and Washington (state), ...
and
Utah
Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. It is one of the Four Corners states, sharing a border with Arizona, Colorado, and New Mexico. It also borders Wyoming to the northea ...
as well as both and central and eastern
Wyoming
Wyoming ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States, Western United States. It borders Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho t ...
(former Pacific Power territory), and southwestern
Wyoming
Wyoming ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States, Western United States. It borders Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho t ...
). In May 2005, ScottishPower announced that it had agreed to sell Pacificorp to
MidAmerican Energy Holdings Company, a company controlled by
Warren Buffett
Warren Edward Buffett ( ; born August 30, 1930) is an American investor and philanthropist who currently serves as the chairman and CEO of the conglomerate holding company Berkshire Hathaway. As a result of his investment success, Buffett is ...
's company,
Berkshire Hathaway
Berkshire Hathaway Inc. () is an American multinational conglomerate holding company headquartered in Omaha, Nebraska. Originally a textile manufacturer, the company transitioned into a conglomerate starting in 1965 under the management of c ...
, for US$5.1 billion in cash and US$4.3 billion in debt and preferred stock. The successful completion of the deal was announced on 21 March 2006, after securing regulatory approvals. The deal did not include PPM Energy (which, as Pacificorp Power Marketing, was formerly the non-regulated subsidiary of Pacificorp).
Takeover bids
Following the announcement of its acquisition of
PacifiCorp
PacifiCorp is an electric power company based in the Lloyd Center Tower in Portland, Oregon with operations in the western United States.
PacifiCorp has two business units: Pacific Power, a regulated electric utility with service territory thro ...
, the group's share price rose but the company was now widely seen as vulnerable to a takeover. It was soon revealed that the German energy group
E.ON, which also owns
Powergen, was interested in a takeover. On 22 November 2005, the board rejected an offer from E.ON of 570 pence per share, which would have valued the group at £10.7 billion.
On 28 November 2006, the board of directors of ScottishPower agreed to an £11.6 billion takeover bid by the Spanish energy firm
Iberdrola
Iberdrola, S.A. () is a Spanish multinational electric utility company based in Bilbao, Spain. It has around 40,000 employees and serves around 30 million customers.
Subsidiary, Subsidiaries include ScottishPower (United Kingdom), Ava ...
. The offer was formally approved by shareholders at an
EGM on 30 March 2007, effectively creating Europe's third largest utility company.
Recent history

On 24 November 2018, the British government's energy regulator, the
Office of Gas and Electricity Markets
The Office of Gas and Electricity Markets (Ofgem) 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 G ...
(Ofgem), appointed ScottishPower as Supplier of Last Resort for the failed domestic and business supplier Extra Energy. ScottishPower acquired all of Extra Energy's 108,000 domestic customers and 21,000 business customers.
On Friday 9 October 2020, Ofgem appointed ScottishPower as Supplier of Last Resort for the failed domestic supplier Tonik Energy. Scottish Power acquired all of Tonik Energy's 130,000 customers.
On Friday 5 December 2020, Ofgem appointed ScottishPower as Supplier of Last Resort for the failed domestic supplier Yorkshire Energy (also known as Daisy Energy). ScottishPower acquired all 74,000 domestic customers and a small number of non-domestic customers.
Controversies and complaints
In April 2007, the energy regulator
Ofgem
The Office of Gas and Electricity Markets (Ofgem) 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 G ...
urged customers of ScottishPower and
EDF Energy to switch to a cheaper provider after the firms refused to cut prices in line with the rest of the industry.
In April 2008, Ofgem launched an investigation into allegations that ScottishPower abused their dominant market position relating to the electricity transmission network they own jointly in Scotland. Ofgem said it had launched its inquiry into Scottish Power and
SSE under section 18 of the
Competition Act
The ''Competition Act'' () is a Canadian federal law governing competition in Canada. The Act contains both criminal and civil provisions aimed at preventing anti-competitive practices in the marketplace.
Along with the ''Competition Tribunal ...
, "based on a formal complaint alleging abuse of a dominant position in the electricity generation sector arising from constrained capacity on the transmission network." The energy regulator believes that energy generators manipulate the power market for profit when supplies are tight because network operator
National Grid has to pay utilities to turn their plants on or off to balance supply and demand. This resulted in companies deliberately shutting their plants down when supplies are tight in order to receive a higher payment to start up again, increasing the system balancing costs at the expense of consumers. Ofgem was alarmed that the cost of balancing the system increased from £70 million in 2007/08 to an estimated £238 million for 2008/09 and an expected £258 million in 2009/10, with most of the costs incurred in Scotland. In January 2009, Ofgem suspended the investigation, saying it would be more effective to deal with the wider problem than pursuing the specific case further.
In November 2012, the
Information Commissioner's Office
The Information Commissioner's Office (ICO) is a non-departmental public body which reports directly to the Parliament of the United Kingdom and is sponsored by the Department for Science, Innovation and Technology. It is the independent regu ...
(ICO) publicly listed ScottishPower as one of a number of companies that it had concerns about due to unsolicited telephone calls for marketing. The concerns were based on complaints. In response, ScottishPower said that it was working with the ICO to address any issues.
In early 2015, ScottishPower was temporarily banned from signing up new customers, due to long-standing and serious concerns regarding poor customer service, overdue bills and failure to implement rulings made by the Energy Ombudsman. The company's failings continued to be highlighted in the press later in the year, with complaints levels 20 times those of their best-performing competitor
In April 2016, ScottishPower released a press release that an £18M agreement had been reached with
Ofgem
The Office of Gas and Electricity Markets (Ofgem) 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 G ...
following their investigation into customer service standards.
In 2017, ScottishPower created controversy when they pursued a couple for a £4,300 debt despite the couple not owing ScottishPower any money and, moreover, not being customers of the firm. ScottishPower ignored letters from the couple, instead sending bailiffs to the home of the couple. It later transpired that the couple were in no debt to ScottishPower.
In 2020, ''
The Observer
''The Observer'' is a British newspaper published on Sundays. First published in 1791, it is the world's oldest Sunday newspaper.
In 1993 it was acquired by Guardian Media Group Limited, and operated as a sister paper to ''The Guardian'' ...
'' gave ScottishPower an award for the year's "worst customer service" for "its singular pursuit of revenue", including sending bills, debt collectors' letters and the threat of bailiffs to people who did not use its services, then refusing to register their complaints.
In January 2021, the Consumers' Association magazine ''
Which?
''Which?'' is a United Kingdom brand name that promotes informed consumer choice in the purchase of goods and services by testing products, highlighting inferior products or services, raising awareness of consumer rights, and offering indepen ...
'' ranked ScottishPower the worst-performing supplier for customer service and the second worst supplier overall in their annual review of energy suppliers.
Operations
Energy Retail
The Energy Retail division contains ScottishPower Energy Retail Ltd which holds the gas and electricity supply licences.
At the end of September 2023, this division held an 8.7% share of the domestic electricity supply market
and 7.5% share of the domestic gas supply market.
This is the lowest market share held by the company since 2004.
Also included in this division is SP Dataserve Ltd which provides a range of metering services including data collection, analysis and revenue protection.
Energy Networks

The Energy Networks business contains three asset owning companies SP Transmission Ltd – holds the transmission licence for central and southern Scotland and owns the part of the
Moyle Interconnector with
Northern Ireland Electricity, SP Distribution Ltd – holds the distribution licence for central and southern Scotland and SP Manweb Plc – holds the distribution licence for North Wales, Merseyside, and Cheshire. A fourth asset management business SP Power Systems Ltd maintains and repairs the distribution networks on behalf of the owners and acts as the
distribution network operator
A distribution network operator (DNO), also known as a distribution system operator (DSO), is the operator of the electric power distribution system which delivers electricity to most end users. Each country may have many local distribution netwo ...
. The
operation of the transmission grid is carried out by the state-owned
National Energy System Operator.
Energy Wholesale
Energy Wholesale contained two companies, ScottishPower Generation Ltd, which formerly generated 6,200 MW of electricity power in the United Kingdom using coal-fired
thermal power stations,
combined cycle
A combined cycle power plant is an assembly of heat engines that work in tandem from the same source of heat, converting it into mechanical energy. On land, when used to make electricity the most common type is called a combined cycle gas turb ...
power stations,
hydro-electric schemes,
pumped storage
Pumping may refer to:
* The operation of a pump, for moving a liquid from one location to another
**The use of a breast pump A breast pump is a mechanical device that Lactation, lactating women use to milking, extract milk from their breasts. They ...
generation and were acquired by Drax in 2018. In 2006, ScottishPower Renewables (SPR) was granted permission to build Europe's largest on-shore
windfarm
A wind farm, also called a wind park or wind power plant, is a group of wind turbines in the same location used to produce electricity. Wind farms vary in size from a small number of turbines to several hundred wind turbines covering an exten ...
. The 322 MW / 140
turbine
A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced can be used for generating electrical ...
site cost an estimated £300m and covers approximately of moorland south of
Glasgow
Glasgow is the Cities of Scotland, most populous city in Scotland, located on the banks of the River Clyde in Strathclyde, west central Scotland. It is the List of cities in the United Kingdom, third-most-populous city in the United Kingdom ...
. By 2014, SPR had a portfolio of over 1,250 MW of operating windfarms, including the recently expanded Whitelee with a total generation capacity of 539 MW, making it Europe's largest windfarm. Also within this division is ScottishPower Energy Management Ltd which is responsible for buying and selling wholesale energy.
In 2005, the
WWF named ScottishPower's
Cockenzie power station as the UK's least carbon-efficient power station. It is now closed.
In 2007, the WWF named ScottishPower's
Longannet power station as the UK's least carbon-efficient power station out of Europe's top 30 worst polluting power stations in absolute terms. It ceased operation in 2016.
PPM Energy
PPM Energy Inc was previously the competitive arm of
Pacificorp
PacifiCorp is an electric power company based in the Lloyd Center Tower in Portland, Oregon with operations in the western United States.
PacifiCorp has two business units: Pacific Power, a regulated electric utility with service territory thro ...
but was made a separate business in 2002. It was involved in
renewable energy
Renewable energy (also called green energy) is energy made from renewable resource, renewable natural resources that are replenished on a human lifetime, human timescale. The most widely used renewable energy types are solar energy, wind pow ...
and gas storage, amongst other things, in the US. It is now part of
Avangrid Renewables.
See also
*
Energy policy of Scotland
*
Energy use and conservation in the United Kingdom
*
Green electricity in the United Kingdom
References
External links
ScottishPower corporate websiteScottishPower customer websiteSP Energy Networks Website
{{Authority control
1990 establishments in Scotland
British companies established in 1990
British subsidiaries of foreign companies
Companies based in Glasgow
Companies formerly listed on the London Stock Exchange
Electric power companies of Scotland
Electric power distribution network operators in the United Kingdom
Energy companies established in 1990
Former nationalised industries of the United Kingdom
Iberdrola
Oil and gas companies of Scotland
Scottish brands
Utilities of Scotland
Wind power companies of Scotland