Company lists · Data refreshed September 2026

Top 25 Electricity transmission companies based in the United Kingdom

Name: Electricity transmission companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 83 companies tracked

RevenueBase identified 83 electricity transmission companies headquartered in the United Kingdom as of September 2026 and tracks 5,496 professional contacts across them, including 1,310 with verified work emails. Leeds is the largest hub.

This list covers electricity transmission companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

83Companies

5,496Contacts tracked

1,310Verified emails

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The 25 largest electricity transmission companies based in the United Kingdom

Ranked by team size

Top 25 of 83 electricity transmission companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to electricity transmission companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Scottish And Southern Electricity Networks	Partial evidence	Perth, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,109 contacts →
	Partial evidence “We're responsible for maintaining the electricity networks supplying over 3.9 million homes and businesses across central southern England and north of the Central Belt of…” Source: RevenueBase Database · checked Sep 19, 2026
2	NIE Networks	Partial evidence	Belfast, United KingdomHQ checked Sep 19, 2026	1,001-5,000	723 contacts →
	Partial evidence “NIE Networks is responsible for the safe, secure and reliable supply of electricity to homes, farms and businesses across Northern Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
3	Freedom	Indirect evidence	Leeds, United KingdomHQ checked Sep 19, 2026	1,001-5,000	664 contacts →
	Indirect evidence “Freedom is a leading provider of facilities and power engineering services.” Source: RevenueBase Database · checked Sep 19, 2026
4	SONI	Partial evidence	Belfast, United KingdomHQ checked Sep 19, 2026	51-200	181 contacts →
	Partial evidence “SONI is Northern Ireland's Transmission System Operator (TSO).” Source: RevenueBase Database · checked Sep 19, 2026
5	Excalon LTD	Indirect evidence	Salford, United KingdomHQ checked Sep 19, 2026	201-500	108 contacts →
	Indirect evidence “Excalon is one of the Britain’s leading UK Electrical Utility Service Providers.” Source: RevenueBase Database · checked Sep 19, 2026
6	Rock Power Connections LTD	Indirect evidence	Bromsgrove, United KingdomHQ checked Sep 19, 2026	51-200	105 contacts →
	Indirect evidence “Rock Power Connections are experts in electrical connections with a proven track record of quality and safety.” Source: RevenueBase Database · checked Sep 19, 2026
7	Avidety	Partial evidence	Sittingbourne, United KingdomHQ checked Sep 19, 2026	51-200	56 contacts →
	Partial evidence “Avidety specialise in the construction and maintenance of overhead and underground electricity networks.” Source: RevenueBase Database · checked Sep 19, 2026
8	Hvss High Voltage Substation Services LTD	Indirect evidence	Watford, United KingdomHQ checked Sep 19, 2026	11-50	55 contacts →
	Indirect evidence “HVSS (High Voltage Substation Services) was formed in 2009 specializing in installation and commissioning of High Voltage Substations Systems up to 400kV.” Source: RevenueBase Database · checked Sep 19, 2026
9	Morris Line Engineering LTD	Indirect evidence	Bridgend Industrial Estate, United KingdomHQ checked Sep 19, 2026	51-200	40 contacts →
	Indirect evidence “MLE was established in 1976 to provide specialist design & manufacturing services for 12kV – 145kV overhead line disconnectors & switches.” Source: RevenueBase Database · checked Sep 19, 2026
10	EDS HV Group	Indirect evidence	Haslingden, United KingdomHQ checked Sep 19, 2026	51-200	37 contacts →
	Indirect evidence “High Voltage Engineering Solutions, from conceptual design, through to installation and O&M.” Source: RevenueBase Database · checked Sep 19, 2026
11	Durkin And Sons Power And Civil Engineers	Indirect evidence	Perivale, United KingdomHQ checked Sep 19, 2026	51-200	35 contacts →
	Indirect evidence “Durkin and Sons have for 40 years been a go-to partner for National Grid, and DNO organisations, who continue to entrust the delivery of large HV & EHV cabling projects to us.” Source: RevenueBase Database · checked Sep 19, 2026
12	Industrial Switchgear Services LTD	Indirect evidence	Hyde, United KingdomHQ checked Sep 19, 2026	51-200	30 contacts →
	Indirect evidence “ISS Ltd are a HV/LV Power Engineering company operating nationwide, undertaking Turnkey Electrical Distribution Projects and Site Service activities, including installation…” Source: RevenueBase Database · checked Sep 19, 2026
13	Instrument & Control Services ICS LTD	Indirect evidence	Stoke On Trent, United KingdomHQ checked Sep 19, 2026	51-200	26 contacts →
	Indirect evidence “At ICS, part of United Infrastructure Group, we power the future with innovative, high-voltage electrical solutions.” Source: RevenueBase Database · checked Sep 19, 2026
14	Dagem Power	Indirect evidence	Cannock, United KingdomHQ checked Sep 19, 2026	11-50	24 contacts →
	Indirect evidence “DAGEM Power are a dynamic and fast-growing SME at the forefront of bringing new renewable and nuclear energy projects online.” Source: RevenueBase Database · checked Sep 19, 2026
15	Neary Construction	Indirect evidence	Wigan, United KingdomHQ checked Sep 19, 2026	51-200	23 contacts →
	Indirect evidence “A civil engineering and construction company specialising in the High Voltage and Extra High Voltage sectors, providing a range of services to clients such as National Grid…” Source: RevenueBase Database · checked Sep 19, 2026
16	MES Power Engineering	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	11-50	23 contacts →
	Indirect evidence “Since its inception in 2005, MES has built an impressive reputation in the specialist market of high voltage power engineering.” Source: RevenueBase Database · checked Sep 19, 2026
17	Maintech Power	Indirect evidence	Ipswich, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “Maintech Power is a High Voltage (HV) installation and maintenance specialist.” Source: RevenueBase Database · checked Sep 19, 2026
18	Power Distribution Specialists	Indirect evidence	Exhall, United KingdomHQ checked Sep 19, 2026	11-50	19 contacts →
	Indirect evidence “Established in 2009, PDS is a High Voltage installation and maintenance company dedicated to providing network power solutions.” Source: RevenueBase Database · checked Sep 19, 2026
19	Smith Brothers Contracting LTD	Indirect evidence	Elland, United KingdomHQ checked Sep 19, 2026	51-200	19 contacts →
	Indirect evidence “If you’re looking for an experienced high voltage power contractor, with a highly-skilled team of multi-disciplined engineers, you’ve found it!” Source: RevenueBase Database · checked Sep 19, 2026
20	Power Engineering Services	Indirect evidence	Wortley, United KingdomHQ checked Sep 19, 2026	11-50	16 contacts →
	Indirect evidence “Unique in its operations, PES engineers substation equipment at its Leeds-based production facility, providing turnkey private network installation, independent contestable…” Source: RevenueBase Database · checked Sep 19, 2026
21	Primary Power Consulting	Partial evidence	Cheadle, United KingdomHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “Primary Power Consulting is a UK‑based power engineering and project management consultancy specialising in the delivery of complex HV and EHV electricity infrastructure.” Source: RevenueBase Database · checked Sep 19, 2026
22	Grid Team Services LTD	Partial evidence	Maghera, United KingdomHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “Grid Team Services efficiently constructs and installs quality end-to-end electrical transmission and distribution systems.” Source: RevenueBase Database · checked Sep 19, 2026
23	PSS Power Engineering LTD	Indirect evidence	Winchester, United KingdomHQ checked Sep 19, 2026	11-50	15 contacts →
	Indirect evidence “PSS POWER ENGINEERING LTD is a high-voltage electrical engineering company based in South East England, United Kingdom.” Source: RevenueBase Database · checked Sep 19, 2026
24	CPD Powerline LTD	Indirect evidence	Loughgall, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “CPD powerline Ltd is an industry leading specialist in the supply, construction and refurbishment of powerlines across the UK and Europe.” Source: RevenueBase Database · checked Sep 19, 2026
25	Central Power LTD	Indirect evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “Central Power Ltd is a High Voltage power engineering company, specialising in the design and construction of electrical power infrastructure for high voltage customers and…” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: electricity transmission companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names electricity transmission companies.
Partial evidence: Its own public description names part of electricity transmission companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electricity transmission companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 83 electricity transmission companies based in the United Kingdom

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Electricity transmission companies based in the United Kingdom at a glance

As of Sep 19, 2026

23.8%Verified-email coverage

66.2Average contacts per company

11-50Median size (employees)

6.0%Largest-city concentration · Leeds

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 83 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among electricity transmission companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “electricity transmission companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names electricity transmission companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among electricity transmission companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,310 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names electricity transmission companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many electricity transmission companies are there based in the United Kingdom?

RevenueBase identified 83 electricity transmission companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Scottish And Southern Electricity Networks, headquartered in Perth, tops this list with the largest team on record.

Which city has the most electricity transmission companies?

Leeds leads with 5 headquartered companies, followed by London (5) and Belfast (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,310 verified decision-maker contacts tracked across these 83 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.