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.
The National Transmission System (NTS) originated in the construction during 1962-3 of the 200 mile (320 km) long high-pressure methane pipeline from Canvey Island to Leeds. Imported liquified natural gas (LNG) from Algeria was regasified at the Canvey terminal and supplied to the pipeline, this provided eight of the twelve Area Boards with access to natural gas. The gas was initially used to manufacture town gas either as a feedstock in gas reforming processes or to enrich lean gases such as that produced by the Lurgi coal gasification process.
The pipeline was 18-inch (460 mm) in diameter and operated at 1,000 pounds per square inch (69 bar). The pipeline had 150 miles (240 km) of spur lines, supplying gas to area boards.
|Area Board||Supply to||Diameter (inches)||Length (miles)|
|North Thames||Bromley/East Greenwich 'Tee'||14||15.5|
|Slough (from Reading spur line)|
|South Eastern||East Greenwich||12||3|
The Gas Council was responsible for this £10 million co-operative scheme and the construction details were a joint effort of the distribution engineers of the Area Boards.
LNG had first been imported to Canvey from Louisiana in February 1959 and piped to Romford gas works as feedstock to a reforming plant.
Natural gas was discovered on the UK continental shelf in 1965 and production started in 1967. The development of offshore natural gas fields is shown in the following table. Shore terminals were built to receive, process, blend and distribute the gas.
|Field||Field type||Licensee or operator||Discovered||First gas onshore||Shore terminal|
|West Sole||Gas||BP||September 1965||March 1967||Easington|
|Leman||Gas||Shell/Esso, Amoco/Gas Council, Arpet Group, Mobil||April 1966||August 1968||Bacton|
|Hewett||Gas||Phillips Petroleum, Arpet group||October 1966||July 1969||Bacton|
|Indefatigable||Gas||Shell/Esso, Amoco/Gas Council||June 1966||October 1971||Bacton|
|Viking||Gas||Conoco/BNOC||May 1968||July 1972||Viking (Theddlethorpe)|
|Rough||Gas||Amoco/Gas Council||May 1968||October 1975||Easington|
|Forties||Oil + associated gas||BP||October 1970||September 1977||St Fergus|
|Frigg (Norway)||Gas||Elf/Total||June 1971||September 1977||St Fergus|
|Frigg (UK)||Gas||Elf/Total||May 1972||September 1977||St Fergus|
|Piper||Oil + associated gas||Occidental group||January 1973||November 1978||St Fergus|
|Tartan||Oil + associated gas||Texaco||December 1974||January 1981||St Fergus|
|Brent||Oil + associated gas||Shell/Esso||July 1971||1982||St Fergus|
|Morecambe Bay||Gas + condensate||Hydrocarbons (GB)||September 1974||1985||Barrow|
With the assured availability of natural gas a government White Paper on fuel policy in November 1967 proposed that natural gas should be immediately and more extensively exploited The Gas Council and Area Boards began a ten-year programme to convert all users and appliances to operate on natural gas and consequently to discontinue the manufacture of town gas at local gasworks. In a pilot scheme users on Canvey Island had been converted to natural gas in 1966.
To exploit the availability of natural gas and to provide for more widespread distribution construction began of a major new transmission network which became the National Transmission System (NTS).
Gas from the West Sole field was first dispatched from the Easington terminal in July 1967, via Feeder No. 1 across the Humber to the East Midland Gas Board's gasworks at Killingholme. It was used to enrich low calorific value manufactured gas. Feeder No. 1 was extended to Totley near Sheffield where it connected to the 18-inch methane pipeline, UK natural gas first entered the NTS in July 1968.
|1||24-inch (600 mm)||90 miles (144 km)||Easington terminal||Scunthorpe and Totley near Sheffield, where it connected to the original methane pipeline.||July 1967/ July 1968|
|2||36-inch (900 mm)||123 miles (197 km)||Bacton terminal||Brisley, Peterborough and Churchover near Rugby, where it connected to the original methane pipeline.||August 1968|
|3||36-inch||107 miles (171 km)||Bacton terminal||Roudham Heath, Cambridge, Whitwell near Hitchin, where it connected to the original methane pipeline.||October 1969|
|4||36-inch||154 miles (246 km)||Bacton terminal||Great Ryburgh, King's Lynn and Alrewas near Lichfield.||Autumn 1970|
|5||36-inch||Bacton terminal||Yelverton, Diss, Chelmsford and Horndon, where it connected to the original methane pipeline||Autumn 1971|
|6||30-inch (750 mm)||91 miles (146 km)||Paull||Pickering (see note), Westwood and Little Burden near Darlington||Autumn 1971|
|7||36-inch||Wisbech||Hatton and Scunthorpe||1972|
|8||30-inch||Former Viking (Theddlethorpe) terminal||Hatton||July 1972|
North Sea gas first reached Scotland in Spring 1970 at Coldstream, this was via an extension of the Leeds-Newcastle pipeline. This pipeline was then extended to Glenmavis near Coatbridge Lanarkshire (Feeder No. 12) where a natural gas liquification plant was constructed.
A major set of pipelines were constructed in Scotland in preparation for arrival of gas from the Frigg gas field in 1977. From the St Fergus terminal in Scotland, two 36-inch (900 mm) pipelines (Feeder No. 10 and No. 11) were laid via Bathgate to Partington and Bishop Auckland to connect to the NTS in England, a total pipeline length of 595 miles (950 km). These lines were commissioned in 1976 and cost £140 million. Initially these pipelines carried gas from southern England into Scotland until the Frigg field began production via St Fergus in September 1977. Compressor stations are provided at 40 mile (65 km) intervals along the pipelines. A third 36-inch pipeline from St Fergus (Feeder No. 12) was completed in 1978, and a fourth 40-inch (1050 mm) pipeline (Feeder No. 13) in 1982.
The NTS was extended from Leeds to Newcastle upon Tyne in early 1969. This line was extended to Coldstream in Spring 1970 and then to Glenmavis near Coatbridge Lanarkshire.
The Wales Gas Board received natural gas supplies in 1969 from a 24-inch line from Churchover (Rugby) to Swansea via Wormington (an extension to Feeder No. 2). North Wales was also connected in 1969 via a 24-inch/18-inch pipeline from Audley Cheshire to Maelor near Wrexham (an extension to Feeder No. 4).
The South Western Gas Board received natural gas at the end of 1970 from a 24-inch/20-inch pipeline from Wormington to Exeter (Feeder No. 14).
A 30-inch/24-inch extension of Feeder No. 3 runs to the west of London via Slough to Mogador Surrey and was commissioned in 1970. An extension of the Feeder No. 5 runs from Horndon-on-the Hill, crosses the Thames at Tilbury and runs via Shorne to connect to Mogador, thus completing the South London ring main, this became operational in early 1972.
In addition to these distribution pipelines in 1971 Area Boards began to supply natural gas directly to major consumers. For example, a 24-inch 17 mile 'spine' pipeline was constructed to ICI Ltd at Billingham (designated as part of Feeder No. 6), and the West Midlands Gas Board laid six similar 'spine' mains into industrial districts of Birmingham and the Black Country.
Most of the NTS was built from the late 1960s to the early 1980s, the growth of the system is shown in the following table.
|Years||NTS mileage||Operational Gas Terminals||Compressor stations|
|1968/9||688||Canvey Easington Bacton||0|
|1970/1||1898||Canvey Easington Bacton||1|
|1972/3||2199||Canvey Easington Bacton Theddlethorpe||4|
|1974/5||2308||Canvey Easington Bacton Theddlethorpe||9|
|1976/7||2915||Canvey Easington Bacton Theddlethorpe St. Fergus||10|
|1978/9||3047||Canvey Easington Bacton Theddlethorpe St. Fergus||11|
|1983||3200||Canvey Easington Bacton Theddlethorpe St. Fergus||14|
Later (post-1983) feeder mains not described above include.
|Feeder No.||From||To||Year commissioned|
|Isle of Grain||Gravesend||2008|
|Elworth||Deeside power station||1994|
|25||Bridge Farm||Mickle Trafford||2001|
The NTS now comprises over 7,600 km of welded steel gas pipelines. The Canvey to Leeds line is no longer part of the NTS.
In addition to the Canvey Island Liquefied Natural Gas (LNG) import terminal, further NGL storage sites were constructed from the late 1960s. These were peak-shaving facilities used to support the NTS at times of high demand, and to ensure security of gas supplies at strategic locations. When demand was high liquefied natural gas was pumped from storage tanks, heated in vapourisers to a gaseous state and delivered into the NTS. When demand was low, gas was withdrawn from the NTS and liquefied by cryogenic cooling to minus 162 °C to replenish the storage tanks.
|Site||LNG storage tank capacity||Commissioned||Decommissioned||Operations|
|Canvey Island, Essex||6 × 4,000 tonnes, 2 × 1,000 tonnes, 4 × 21,000 tonnes (underground)||1959, 1964, 1968, 1975||1984||Import of LNG from Arzew Algeria, original contract for 1 billion m3 of gas a year (c.100 MMSCFD). Liquefication 205 tonnes/day, vapourisation 6 × 50 tonnes/hour.|
|Ambergate, Derbyshire||5,000 tonnes (1 × 12,000 m3) ||1967-1970||1985||Import of LNG by road tanker from Canvey, output 72 MMSCFD (2.04 million m3/d)|
|Glenmavis, Lanarkshire||20,000 tonnes (2 × 47,800 m3),||1972, 1974||2012||Liquefication 100 tonnes per day, vapourisation 250 MMSCFD (7 million m3/day)|
|Partington, Cheshire||4 × 20,000 tonnes (4 × 49,800 m3)||1972 1972, 1974||March 2012||Liquefication 10 MMSCFD (283,000 m3/day), vapourisation 8 × 75 tonnes/hour|
|Dynevor Arms, (Hirwaun) Rhondda Cynon Taf||2 × 20,000 tonnes||1972||March 2009||Liquefication 10 MMSCFD (283,000 m3/day), vapourisation 2 × 75 tonnes/hour|
|Avonmouth, Bristol||3 × 50,000 m3||1974-1980; 1978, 1979, 1983||April 2016||Short-term storage, liquefication 205 tonnes/day, vapourisation 6 × 75 tonnes/hour|
|Isle of Grain, Kent||4 × 50,000 m3, 4 × 190,000 m3||1980-2010||Operating||Vapourisation 58 million m3/day. See Grain LNG Terminal|
In addition to LNG storage for peak-shaving, several sites had storage facilities for high pressure gas that could be released into, and pressurised from, the NTS. The following sites were operational by 1972.
NTS is the starting point for UK gas distribution. The pipeline system for houses is not part of the NTS, but is part of the Gas Distribution Network of Local Distribution Zones, the two systems combine to form the UK's gas distribution network.
The two types of gas pipelines in the UK are: large diameter high-pressure (up to 85 bar and 1050 mm diameter) pipelines - the type that the NTS uses, and smaller diameter lower pressure pipelines that connect to users who burn gas for heat. The wall thickness of the high pressure pipelines is up to 0.625-inches (18mm).
Gas currently enters the NTS from a number of sources:
|Content or Characteristic||Value|
|Gross Calorific Value||37.0 – 44.5 MJ/m3|
|Wobbe Number*||47.2 – 51.41 MJ/m3|
|Water Dewpoint||<-10 °C @ 85barg|
|Hydrocarbon Dewpoint||<-2 °C|
|Hydrogen Sulphide content*||≤5 mg/m3|
|Total Sulphur content (including H2S)*||≤50 mg/m3|
|Hydrogen content*||≤0.1% (molar)|
|Oxygen content*||≤0.2% (molar)|
|Carbon Dioxide content||≤2.0% (molar)|
|Nitrogen content||<5.0% (molar)|
|Incomplete Combustion Factor*||≤0.48|
Parameters marked * are specified in the Gas Safety (Management) Regulations 1996.
The composition of natural gas in the NTS is typically as follows.
There are twenty five (mostly gas turbine driven) compressor stations and over 25 pressure regulators. Gas moves through the NTS at speeds up to 25 mph (40 km/h) depending on pressures and pipeline diameters. Compressor stations generally operate at a pressure ratio of 1:1.4, this ratio is a balance between maintaining pressure and hence flow, and the capital and running cost of the compressors. It also ensures that the temperature rise across the compressors is not high enough to require after-coolers to prevent damage to the pipeline protective coatings. On the pipelines from St Fergus, compressor stations are provided at 40 mile (65 km) intervals; each compresses the gas from about 48 bar at 5 °C to 65 bar at 45 °C.
Compressor stations include:
|Station||Gas turbines||Power rating (MW)||Commissioned|
|Alrewas||2 Rolls-Royce Avons||21.6||1970|
|Peterborough||3 Rolls-Royce Avons||35.4||1972|
|Scunthorpe||2 Rolls-Royce Avons||23.6||1973|
|Chelmsford||2 Rolls-Royce Avons||23.0||1973|
|King's Lynn||4 Rolls-Royce Avons||47.2||1973|
|Cambridge||2 Rolls-Royce Avons||23.0||1974|
|Bishop Auckland||2 Orendas||14.4||1974|
|Kirriemuir||4 Rolls-Royce Avons||47.2||1977|
|Bathgate||4 Rolls-Royce Avons||47.2||1977|
|Diss||3 Rolls-Royce Avons||34.5||1977|
|St Fergus I||4 Rolls-Royce Avons||47.2||1977|
|St Fergus II||2 Rolls-Royce Maxi Avons, 3 Rolls-Royce RB211s||65.3||1978|
|Moffat||2 Rolls-Royce RB211s||38.6||1980|
|Wisbech||1 Rolls-Royce RB211, 1 Rolls-Royce Maxi Avon||32.6||1980|
Offtakes from the NTS include those supplying industrial users, local distribution networks, storage sites and export pipelines.
|National Grid Area||Number of LDZ offtakes|
Companies that own part of this gas network, also known as the Local Transmission System (LTS), are known officially as Gas Transporters. Gas enters this network via the NTS through a pressure reduction station to the twelve gas distribution zones in England, Scotland and Wales within eight distribution networks. The network covers 275,000 km (171,000 mi). The LTS is managed from Hinckley, Leicestershire (former headquarters of the NTS). Financial transactions between gas transporters are managed by Xoserve, based in Solihull. It was formerly an internal department of National Grid and then became an independent company.
For retail distribution, Cadent owns the network in North West England, the West Midlands, the East Midlands, the East of England and North London. In the North of England, local distribution is owned by Northern Gas Networks; in the Wales and West by Wales and West Utilities; and in Southern England and Scotland by SGN.
The changing ownership of the NTS reflects developments and corporate changes in the UK gas and energy industries.
NG is administratively based in Warwick. NG owns and operates the gas transmission system in all of Great Britain; in comparison it only owns the electrical transmission system in England and Wales but operates it for all of Great Britain.
Northern Ireland is not part of the NTS per se and gets its gas via the Scotland-Northern Ireland pipeline (SNIP) owned by Premier Transmission and built between 1994 and 1996. The gas network in Northern Ireland is split, with one area owned by Phoenix Natural Gas and the other by Firmus Energy.
Independent Power Transmission Operator S.A. (IPTO or ADMIE from "ΑΔΜΗΕ" - Ανεξάρτητος Διαχειριστής Μεταφοράς Ηλεκτρικής Ενέργειας A.E. in Greek) is the Transmission System Operator for the Hellenic Electricity Transmission System. The mission of the Company is the operation, control, maintenance and development of the national transmission system of Greece to ensure the reliable and efficient electricity supply, as well as the operation of the electricity market following the principles of transparency and equality.
Since February 2012 it is independent in operation and management, retaining the necessary independence required for compliance with 2009/72/EC EU Directive.
Till the end of June 2017 it was a wholly owned subsidiary of Public Power Corporation of Greece (PPC S.A.).
As of June 20, 2017 ADMIE follows the model of proprietary separated Administrator (Ownership Unbundling) and is fully harmonized with the Directive 2009/72/EC.
The current shareholder structure of ADMIE is as follows:
51% ADMIE HOLDINGS Inc.,
25% DES ADMIE S.A.,
24% State Grid Europe Limited.
Until 31 January 2012, ADMIE was a joint company with the Hellenic Electricity Market Operator S.A. (now called LAGIE S.A. from "ΛΑΓΗΕ" - Λειτουργός Αγοράς Ηλεκτρικής Ενέργειας A.E. in Greek) under the name "Hellenic Transmission System Operator S.A." (HTSO or DESMIE from "ΔΕΣΜΗΕ" - Διαχειριστής Ελληνικού Συστήματος Μεταφοράς Ηλεκτρικής Ενέργειας Α.Ε. in Greek).ADMIE's compliance with the requirements applicable to the model of the Independent Transmission Operator was certified by the Regulatory Authority for Energy (RAE) in December 2012.
As of 30 June 2012, the Hellenic Electricity Transmission System comprised 11.303 km of transmission lines and 291 Substations with a total installed capacity of 50.749 MVA :
2632 km of 400 kV lines (overhead and underground)
267 km of D.C. 400 kV lines (overhead and submarine)
8349 km of 150 kV lines (overhead, submarine and underground)
55 km of 66 kV lines (overhead, submarine and underground)ADMIE S.A. is a member of ENTSO-E (the European Network of Transmission System Operators for Electricity).Beltoft
Beltoft is a hamlet in the civil parish of Belton , North Lincolnshire, England. The village lies within the Isle of Axholme, and 4 miles (6 km) south-east from Crowle.
There is a gas offtake from the National Transmission System at Beltoft, which is run by Scottish Power. It is connected by a 9.3-mile (15.0 km) pipeline to a gas compression station on Hatfield Moor, which pumps gas into a depleted natural gas field located 1,450 feet (440 m) below the moor. When more gas is required, the gas is extracted again, and re-enters the National Transmission System at Beltoft.The only public building in the village is the Methodist Chapel. In the 18th century, the Quakers were quite active in the area, and they had their own burial ground in the village. This site was reused by the Methodists, who built the first chapel there in 1833. That building was demolished and a new chapel built in 1904, and the premises were extended in 1923, when a Sunday School was added. The building sits in a wide plot, with a grassed area to the east of it, which was the former burial ground.Beltoft was one of the first villages to benefit from the third phase of the Northern Lincs Broadband initiative, a programme designed to ensure that rural communities were not left out in the provision of super-fast and ultra-fast broadband services. The multi-million pound programme uses Fibre-to-the-Premises (FTTP) technology, which involves running fibre-optic cables from the telephone exchange into the business premises or homes of customers. Many other parts of North Lincolnshire will have a Fibre-to-the-Cabinet (FTTC) service, which provides super-fast broadband, but not the ultra-fast service available in Beltoft. The scheme is funded by North Lincolnshire Council, and benefitted from £2.9 million saved by efficiencies during the first phase of the programme.British Energy Efficiency Federation
The British Energy Efficiency Federation (or BEEF) was founded in 1996 by the United Kingdom Government to provide a forum for consultation between existing industry associations in the energy sector.Cadent Gas
Cadent Gas owns, operates and maintains the largest gas distribution network in the UK, transporting gas to 11 million homes and businesses across West Midlands, North West England, East of England and North London.50% of UK gas customers are served by their pipeline system. The company does not produce or own the gas that passes through their pipeline networks.
In 2017/18 Cadent Gas Limited replaced and improved 1,625 km of mains pipe.
Cadent Gas Limited represents four of the eight gas distribution networks in the United Kingdom. Following production and importation, all gas in the UK passes through National Grid’s national transmission system, before entering the distribution networks. The distribution network providers, one of which is Cadent Limited, are responsible for the safe and efficient transportation of the gas to the end consumer, on behalf of the chosen supplier.
The company also manages the national gas emergency service free phone line on behalf of the gas industry in the UK, taking calls and giving safety advice on behalf of the industry. In 2017/18 1.5 million gas emergency calls were answered.
The company invests in raising awareness of the dangers of carbon monoxide poisoning through community and school initiatives as well as improving services to protect and support customers in vulnerable situations.
In 2017, the company launched a two-year fundraising partnership with Alzheimer’s Society and committed to creating 1,000 Dementia Friends and also raising £100,000 companywide for the charity. Cadent Gas Limited also sponsor ‘EmployAbility - Let’s Work Together’ scheme which changes young disabled peoples’ lives for the better. It is founded on relationships with local schools, Dorothy Goodman in Leicestershire and Oakwood, Woodlands and Exhall Grange in Warwickshire. It is an employee-led supported internship scheme for young people aged 17 to 19. Since the scheme began in 2014 an average of 71% of interns gained paid employment either with them or with other local companies, compared to the national average of 6%. The company was recently awarded ‘Most Supportive Employer’ by the National Autistic Society.In 2018, Cadent Gas Limited were awarded for being the top UK Company for apprentices to work and amongst the top 20 companies for Graduates.Central Area Transmission System
The Central Area Transmission System (known as CATS) is a natural gas transportation and processing system that transports gas through 404 kilometres of pipeline from the Central North Sea to a reception and processing terminal at Teesside in the North East of England.Churchover
Churchover is a small village and civil parish in Warwickshire, England. The population of the parish in the 2001 census was 230, increasing to 251 at the 2011 census.It is located around 4 miles (7 km) north of Rugby, and is administratively part of the borough of Rugby.
The village lies just west of the A426 road, and just north of the M6 motorway on the border with Leicestershire.
Within the parish boundaries is Coton House, a mansion house dating from 1787.
The village contains the Holy Trinity Church which dates partly from the 15th century and is a Grade II* listed building.A major gas compression station and a pipeline pigging and transfer compound, both part of the National transmission system, are located to the south-west of the village.Elektromreža Srbije
Elektromreža Srbije (abbr. EMS; Serbian Cyrillic: Електромрежа Србије) is a Serbian national transmission system operator company with the headquarters in Belgrade, Serbia.
It was founded in 2005 after being split from Elektroprivreda Srbije and it is specialized in the transmission of electrical power. It is a member of the European Network of Transmission System Operators for Electricity.Elering
Elering AS (former name: OÜ Põhivõrk) is a national transmission system operator for electricity and natural gas with headquarters in Tallinn, Estonia. The managing director of Elering is Taavi Veskimägi.Energinet
Energinet is the Danish national transmission system operator for electricity and natural gas. It is an independent public enterprise owned by the Danish state under the Ministry of Climate and Energy. Energinet has some 1150 employees, and its headquarters are located in Erritsø near Fredericia in Jutland. The gas division is located in Ballerup near Copenhagen.
The main tasks are to ensure efficient operation and development of the national electricity and gas infrastructure as well as ensuring equal access for all users of the infrastructure. Energinet also plays a role in developing a carbon dioxide free energy system in Denmark.Energy Retail Association
The Energy Retail Association (ERA) was a trade association which promoted the interests of electricity and gas retailers in the domestic market in Great Britain, formed in 2003. In April 2012 it merged with the Association of Electricity Producers and the UK Business Council for Sustainable Energy to become Energy UK.Franco-British Nuclear Forum
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Hatton is a small village and civil parish in the East Lindsey district of Lincolnshire, England. It is situated 3 miles (5 km) east from the town of Wragby, 6 miles (10 km) north-west from the town of Horncastle, and just north from the A158 road.
Neighbouring villages are Sotby, Panton and Great Sturton.
Hatton Wood, a Site of Special Scientific Interest (SSSI), lies 1 mile (1.6 km) to the south-west of the village. It forms part of the Bardney Limewoods National Nature Reserve. Hatton Meadows, a nature reserve belonging to the Lincolnshire Wildlife Trust, lies to the north of Hatton Wood.The National Transmission System has one of its twenty six compressor stations, driven by three gas turbines, just off the A158 west of the village at Hatton Bridge.
Hatton church is dedicated to Saint Stephen, and is a Grade II listed building dating from the 13th century, rebuilt in 1870 by James Fowler.The deserted medieval village (DMV) of Schankeston was in or near the village.A public house on the A158, The New Midge, is now openNational Grid plc
National Grid plc is a British multinational electricity and gas utility company headquartered in Warwick, United Kingdom. Its principal activities are in the United Kingdom and Northeastern United States. It has a primary listing on the London Stock Exchange, and is a constituent of the FTSE 100 Index. It has a secondary listing on the New York Stock Exchange.New Electricity Trading Arrangements
New Electricity Trading Arrangements (NETA) is the system of market trading arrangements under which electricity is traded in the United Kingdom's wholesale electricity market as of 27 March 2001. The arrangements provided that parties could trade off their imbalances close to real time.Northern Powergrid
Northern Powergrid Holdings Company (formerly CE Electric UK Funding Company) is an electrical distribution company based in Newcastle Upon Tyne in England. It is the owner of Northern Powergrid (Northeast) Limited (formerly Northern Electric Distribution Limited (NEDL)) and Northern Powergrid (Yorkshire) plc (formerly Yorkshire Electricity Distribution plc (YEDL)) which are the Distribution Network Operators for the North East England and Yorkshire regions and the North Lincolnshire area.Point of Ayr Gas Terminal
The Point of Ayr Gas Terminal is a gas terminal situated on the Point of Ayr in Flintshire, Wales. It takes gas from eni's Liverpool Bay Development.Regal Petroleum
Regal Petroleum plc is a petroleum company based in London with assets in Romania, Ukraine, Greece, and Egypt. It was founded by Frank Timiş in November 1996, and is listed on the London Alternative Investment Market.UK Power Networks
UK Power Networks is a distribution network operator for electricity covering South East England, the East of England and London. It manages three licensed distribution networks (Eastern Power Networks PLC, South Eastern Power Networks PLC and London Power Networks PLC) which together cover an area of 30000 square kilometres and approximately eight million customers.
In 2014 UK Power Networks was awarded £25 million from the electricity regulator Ofgem's Low Carbon Networks Fund for the Low Carbon London project. In 2011 it was awarded £6.7 million by Ofgem for another project, Flexible Plug and Play, which is researching new ways, technical and commercial, to connect renewable energy to the distribution network in Cambridgeshire.
As well as the three distribution arms UK Power Networks also operates UK Power Networks Services Holdings Limited, which develops and maintains electrical networks for clients including London Underground, Heathrow and Stansted airports, Docklands Light Railway and Canary Wharf.Western Power Distribution
Western Power Distribution is the trading identity of four electricity distribution companies - WPD South West (operating in South West England), WPD South Wales (operating in South Wales) and WPD Midlands (operating in East Midlands and West Midlands). All of the companies act as the distribution network operator for their respective regions, and are registered in Bristol, England. Western Power Distribution serves approximately 7.7 million customers over its combined distribution areas.
Western Power Distribution is a subsidiary of the American utility corporation PPL.
It should not be confused with WPD, a wind farm company in north-western Europe, or Western Power Corporation, an electricity distributor in Australia.