North Eastern Electric Supply Company

North Eastern Electric Supply Company (NESCo)

Company type	Private company (before nationalisation)
Industry	Electricity supply
Founded	1889
Founder	John Theodore Merz
Defunct	1948
Fate	Nationalised under the Electricity Act 1947
Headquarters	Newcastle upon Tyne , England, United Kingdom
Area served	North East England
Key people	Charles Hesterman Merz (Chief Consultant Engineer)
Products	Electricity supply

The North Eastern Electric Supply Company (NESCo) was a primary electricity provider across much of North East England prior to the nationalisation of the British electricity sector under the Electricity Act 1947. Originally established in 1889 as the Newcastle upon Tyne Electric Supply Company, it adopted the NESCo name as its operational footprint expanded regionally.

History

Established in Newcastle upon Tyne in 1889 by industrialist John Theodore Merz, NESCo was one of two electric companies founded in the area that year, alongside the Newcastle and District Electric Lighting Company (DisCo), created by Charles Algernon Parsons. NESCo’s supply area covered the east side of Grainger Street, while DisCo served the western part.

In 1890, NESCo commissioned its initial power generation facility, Pandon Dene. Charles Hesterman Merz, son of John Theodore Merz, acted as Chief Consultant Engineer. His engineering firm, Merz & McLellan, co-founded with William McLellan, undertook much of NESCo’s engineering design from 1898 onward. They were responsible for the innovative Neptune Bank Power Station (1901), which was the UK's first to produce three-phase electric power and supply electricity specifically for industrial applications. This development spurred NESCo’s rapid expansion and gave Tyneside industries a significant competitive advantage. For thirty years after Neptune Bank commenced operations, NESCo was at the forefront of worldwide power station innovation.

In 1903, NESCo launched Carville Power Station to energize the Tyneside Electrics. The company expanded further in 1905 by acquiring Walker and Wallsend Union Gas Company. Following regulatory conflicts with DisCo, NESCo extended its service area south of the River Tyne, inaugurating Dunston Power Station in 1910. By 1914, it had absorbed multiple regional entities such as County of Durham Electrical Power Distribution Company and Houghton-le-Spring and District Electric Lighting Company. The opening of Carville B Power Station in 1916 marked it as the world’s most cost-efficient plant at that time. After World War I, NESCo continued growing through acquisitions including Cleveland and Durham County Electric Power Company, Northern Counties Electricity Supply Company, Durham County Electric Power Company, Tees Power Station Company, along with assets from dissolved companies like Durham Collieries Electric Power Company and Hexham & District Supply Company. Additional expansions featured North Tees Power Station (1921) and Dunston B Power Station (1933).

In 1927, NESCo moved its headquarters to Carliol House in Newcastle city centre, a building designed by architect Robert Burns Dick. Carliol House Ltd., formed in 1924 to oversee the property, operated independently until nationalisation occurred in 1974.

The North-Eastern Electric Supply Act 1932 (22 & 23 Geo. 5. c. xxxii) unified Newcastle upon Tyne Electric Supply Company and its subsidiaries into a single organisation—NESCo. In June 1932, this entity acquired Durham Electrical Power Distribution Company.

Following nationalisation under the Electricity Act 1947, the British electricity industry was reorganised in 1948. A new regional body called the British Electricity Authority (NESCo) was created based on NESCo’s existing service territory but expanded to incorporate DisCo, Askrigg and Reeth Supply Company, and Hawes Electric Lighting Company districts—stretching from York up to the Scottish border. This authority was subsequently renamed the North Eastern Electricity Board.

Further reading

• Byatt, I.C.R. The British electrical industry, 1875-1914: the economic returns to a new technology. Oxford University Press, 1979.
• Hannah, Leslie. Electricity Before Nationalisation: A Study in the Development of the Electricity Supply Industry in Britain to 1948. Macmillan Publishers for the Electricity Council, 1979.
• McGovern, T. & McLean, T. "The genesis of the electricity supply industry in Britain: a case study of NESCo from 1889 to 1914," Business History 59 (2017), 667-689. (Preprint at Durham Research Online)