Company lists · Data refreshed September 2026

Top 23 Transmission and distribution companies based in the United Kingdom

RevenueBase identified 54 transmission and distribution companies headquartered in the United Kingdom as of September 2026 and tracks 35,558 professional contacts across them, including 15,308 with verified work emails. London is the largest hub.

This list covers transmission and distribution 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
54Companies
35,558Contacts tracked
15,308Verified emails
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The 23 largest transmission and distribution companies based in the United Kingdom

Ranked by team size
Top 23 of 54 transmission and distribution 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 transmission and distribution 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceLondon, United KingdomHQ checked Sep 19, 202610001+24,403 contacts →

Indirect evidence

“We power the lives of millions of people across Britain, New York and Massachusetts, moving energy from where it’s made to the communities that need it, every single day.”

Source: RevenueBase Database · checked Sep 19, 2026
2Partial evidenceLondon, United KingdomHQ checked Sep 19, 20265,001-10,0002,949 contacts →

Partial evidence

“UK Power Networks is a Distribution Network Operator providing power to a quarter of the UK's population.”

Source: RevenueBase Database · checked Sep 19, 2026
3Indirect evidenceGlasgow, United KingdomHQ checked Sep 19, 20261,001-5,0001,523 contacts →

Indirect evidence

“We transmit, distribute and connect electricity to and from 3.5 million homes and businesses over our network, 24 hours a day, every day of the year.”

Source: RevenueBase Database · checked Sep 19, 2026
4Partial evidenceNorth West England, United KingdomHQ checked Sep 19, 20261,001-5,0001,322 contacts →

Partial evidence

“We own and operate the North West's electricity distribution network.”

Source: RevenueBase Database · checked Sep 19, 2026
5Indirect evidencePerth, United KingdomHQ checked Sep 19, 20261,001-5,0001,109 contacts →

Indirect 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
6Indirect evidenceBelfast, United KingdomHQ checked Sep 19, 20261,001-5,000723 contacts →

Indirect 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
7Indirect evidenceLeeds, United KingdomHQ checked Sep 19, 20261,001-5,000664 contacts →

Indirect evidence

“Freedom is a leading provider of facilities and power engineering services.”

Source: RevenueBase Database · checked Sep 19, 2026
8Partial evidenceBelfast, United KingdomHQ checked Sep 19, 202651-200181 contacts →

Partial evidence

“SONI is Northern Ireland's Transmission System Operator (TSO).”

Source: RevenueBase Database · checked Sep 19, 2026
9Indirect evidenceLeatherhead, United KingdomHQ checked Sep 19, 202651-200136 contacts →

Indirect evidence

“ESP Utilities Group Ltd is licensed to operate gas and electricity networks by the industry regulator Ofgem and has helped thousands across the country to make the connection.”

Source: RevenueBase Database · checked Sep 19, 2026
10Indirect evidenceSalford, United KingdomHQ checked Sep 19, 2026201-500108 contacts →

Indirect evidence

“Excalon is one of the Britain’s leading UK Electrical Utility Service Providers.”

Source: RevenueBase Database · checked Sep 19, 2026
11Indirect evidenceSittingbourne, United KingdomHQ checked Sep 19, 202651-20056 contacts →

Indirect evidence

“Avidety specialise in the construction and maintenance of overhead and underground electricity networks.”

Source: RevenueBase Database · checked Sep 19, 2026
12Indirect evidenceCannock, United KingdomHQ checked Sep 19, 202611-5024 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
13Indirect evidenceWortley, United KingdomHQ checked Sep 19, 202611-5016 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
14Strong evidenceMaghera, United KingdomHQ checked Sep 19, 202611-5016 contacts →

Strong evidence

“Grid Team Services efficiently constructs and installs quality end-to-end electrical transmission and distribution systems.”

Source: RevenueBase Database · checked Sep 19, 2026
15Indirect evidenceChatham, United KingdomHQ checked Sep 19, 202611-5010 contacts →

Indirect evidence

“Experts in electrical infrastructure for engineering & construction sectors.”

Source: RevenueBase Database · checked Sep 19, 2026
16Partial evidenceSleaford, United KingdomHQ checked Sep 19, 202611-509 contacts →

Partial evidence

“EME Power Systems Limited is a leading national provider of power distribution services to business and industry.”

Source: RevenueBase Database · checked Sep 19, 2026
17Indirect evidenceNewport, United KingdomHQ checked Sep 19, 202611-508 contacts →

Indirect evidence

“MARBLE POWER LIMITED is an energy supply company based out of Kestrel Court, Waterwells Drive, Quedgeley, Gloucester, United Kingdom.”

Source: RevenueBase Database · checked Sep 19, 2026
18Indirect evidenceClydebank, United KingdomHQ checked Sep 19, 20261-104 contacts →

Indirect evidence

“With over 20 years of experience in the electrical industry, ETI Scotland has built a strong reputation for delivering reliable, professional, and fully compliant electrical…”

Source: RevenueBase Database · checked Sep 19, 2026
19Indirect evidenceBelfast, United KingdomHQ checked Sep 19, 202611-503 contacts →

Indirect evidence

“We’re proud of our heritage, our skills, our knowledge and our desire to offer the best service to our clients.”

Source: RevenueBase Database · checked Sep 19, 2026
20Strong evidenceTelford, United KingdomHQ checked Sep 19, 202611-503 contacts →

Strong evidence

“For over 50 years, Webster-Wilkinson have designed, manufactured and supplied a comprehensive range of Transformer Components to the Transmission & Distribution marketplace – both…”

Source: RevenueBase Database · checked Sep 19, 2026
21Indirect evidenceHarlow, United KingdomHQ checked Sep 19, 20261-102 contacts →

Indirect evidence

“POSITIVE SOLUTIONS ELECTRICAL LTD is an utilities company based out of 4 TOLLSWORTH WAY PUCKERIDGE, NR WARE, United Kingdom.”

Source: RevenueBase Database · checked Sep 19, 2026
22Indirect evidenceTurvey, United KingdomHQ checked Sep 19, 202611-501 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
23Partial evidenceLarne, United KingdomHQ checked Sep 19, 20261-101 contacts →

Partial evidence

“Based in Northern Ireland, Flux Energy have extensive experience in the design, construction, testing, operation and maintenance of electrical distribution systems from 415V up to…”

Source: RevenueBase Database · checked Sep 19, 2026

Showing 23 of 54 transmission and distribution companies based in the United Kingdom

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Transmission and distribution companies based in the United Kingdom at a glance

As of Sep 19, 2026
43.1%Verified-email coverage
658.5Average contacts per company
11-50Median size (employees)
13.0%Largest-city concentration · London
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
16
11-50
18
51-200
9
201-500
1
1,001-5,000
6
5,001-10,000
2
10001+
1

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 54 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 transmission and distribution 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 “transmission and distribution 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 transmission and distribution 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 transmission and distribution 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, 15,308 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 transmission and distribution 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 transmission and distribution companies are there based in the United Kingdom?

RevenueBase identified 54 transmission and distribution 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?

National Grid, headquartered in London, tops this list with the largest team on record.

Which city has the most transmission and distribution companies?

London leads with 7 headquartered companies, followed by Belfast (3) and Leeds (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 15,308 verified decision-maker contacts tracked across these 54 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.