Company lists · Data refreshed September 2026

Top 25 Power distribution engineering companies based in the United Kingdom

Name: Power distribution engineering 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 17, 2026 2,572 companies tracked

RevenueBase identified 2,572 power distribution engineering companies headquartered in the United Kingdom as of September 2026 and tracks 29,159 professional contacts across them, including 9,918 with verified work emails. London is the largest hub.

This list covers power distribution engineering 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 17, 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 17, 2026 86% judged on-target in blind review

2,572Companies

29,159Contacts tracked

9,918Verified emails

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The 25 largest power distribution engineering companies based in the United Kingdom

Ranked by team size

Top 25 of 2,572 power distribution engineering companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to power distribution engineering 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	SP Energy Networks	Indirect evidence	Glasgow, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,523 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 17, 2026
2	Lucy Electric	Strong evidence	Thame, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,238 contacts →
	Strong evidence “Lucy Electric is a leader in secondary power distribution solutions with over 100 years’ industry experience.” Source: RevenueBase Database · checked Sep 17, 2026
3	Kelly Group	Indirect evidence	Wembley, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Source: RevenueBase Database · checked Sep 17, 2026
4	Penspen	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,007 contacts →
	Indirect evidence “Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
5	Freedom	Strong evidence	Leeds, United KingdomHQ checked Sep 17, 2026	1,001-5,000	664 contacts →
	Strong evidence “Freedom is a leading provider of facilities and power engineering services.” Source: RevenueBase Database · checked Sep 17, 2026
6	Aureos	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	583 contacts →
	Partial evidence “Aureos is a multi-disciplinary energy, transport networks specialist and engineering services provider, spanning the design, engineering, installation, maintenance, and crisis…” Source: RevenueBase Database · checked Sep 17, 2026
7	Balfour Beatty Kilpatrick	Partial evidence	Glasgow, United KingdomHQ checked Sep 17, 2026	1,001-5,000	456 contacts →
	Partial evidence “As a leading mechanical & electrical engineering provider, we design, install and maintain the complex systems and technologies that underpin the UK’s national infrastructure and…” Source: RevenueBase Database · checked Sep 17, 2026
8	Quartzelec Limited	Partial evidence	Rugby, United KingdomHQ checked Sep 17, 2026	501-1,000	412 contacts →
	Partial evidence “Quartzelec is a leading independent electrical engineering group delivering solutions and services in both UK and global markets.” Source: RevenueBase Database · checked Sep 17, 2026
9	Brush Group	Indirect evidence	Loughborough, United KingdomHQ checked Sep 17, 2026	501-1,000	367 contacts →
	Indirect evidence “We support the global drive to net zero with innovative, engineered solutions that address grid resilience and systems challenges, facilitate electrification of transport and…” Source: RevenueBase Database · checked Sep 17, 2026
10	SPL Powerlines Uk&i	Indirect evidence	Coatbridge, United KingdomHQ checked Sep 17, 2026	501-1,000	337 contacts →
	Indirect evidence “SPL Powerlines UK & I is a leading multi-disciplinary infrastructure specialist, offering end-to-end delivery across both rail and energy sectors with capabilities that set us…” Source: RevenueBase Database · checked Sep 17, 2026
11	IQA Elecnor	Indirect evidence	Glasgow, United KingdomHQ checked Sep 17, 2026	201-500	184 contacts →
	Indirect evidence “IQA lead the way in designing, building, maintaining, and upgrading electrical utility networks, telecommunication networks, EVCP and electrical infrastructure for both the public…” Source: RevenueBase Database · checked Sep 17, 2026
12	WB Power Services LTD	Partial evidence	Heanor, United KingdomHQ checked Sep 17, 2026	51-200	168 contacts →
	Partial evidence “WB Power Services Ltd (now proudly part of Rehlko) provide critical power services to some of the UK’s most important businesses and organisations, ensuring essential services are…” Source: RevenueBase Database · checked Sep 17, 2026
13	Denmans Electrical	Indirect evidence	Bristol, United KingdomHQ checked Sep 17, 2026	501-1,000	164 contacts →
	Indirect evidence “Denmans has over 50 branches nationwide and is part of the largest Electrical Distributor in the world, the Rexel Group.” Source: RevenueBase Database · checked Sep 17, 2026
14	Asee Group	Partial evidence	Newry, United KingdomHQ checked Sep 17, 2026	51-200	151 contacts →
	Partial evidence “ASEE Group is a leader in mechanical and electrical engineering, specialising in generator integration and full-service installations for 45+ years.” Source: RevenueBase Database · checked Sep 17, 2026
15	Aptus Utilities LTD	Indirect evidence	Bolton, United KingdomHQ checked Sep 17, 2026	201-500	146 contacts →
	Indirect evidence “Aptus Utilities is a leading multi-utility connections provider delivering electric, water, gas, EV Charging and street lighting design and installation services throughout the UK.” Source: RevenueBase Database · checked Sep 17, 2026
16	PN Daly Limited	Indirect evidence	Rochdale, United KingdomHQ checked Sep 17, 2026	501-1,000	141 contacts →
	Indirect evidence “P.N.” Source: RevenueBase Database · checked Sep 17, 2026
17	DPS Group	Indirect evidence	Glenrothes, United KingdomHQ checked Sep 17, 2026	51-200	139 contacts →
	Indirect evidence “Shaping the future, together.” Source: RevenueBase Database · checked Sep 17, 2026
18	Powersystems	Indirect evidence	Bristol, United KingdomHQ checked Sep 17, 2026	51-200	126 contacts →
	Indirect evidence “Powered by People.” Source: RevenueBase Database · checked Sep 17, 2026
19	Swann Engineering Group LTD	Partial evidence	Braintree, United KingdomHQ checked Sep 17, 2026	51-200	123 contacts →
	Partial evidence “About Swann Engineering Group Founded in 1974, Swann Engineering Group specializes in delivering turnkey solutions for complex engineering challenges.” Source: RevenueBase Database · checked Sep 17, 2026
20	Integrated Utility Services	Partial evidence	Wakefield, United KingdomHQ checked Sep 17, 2026	51-200	121 contacts →
	Partial evidence “Integrated Utility Services (IUS) aims to be the UK's leading provider of power infrastructure for the public and private sectors.” Source: RevenueBase Database · checked Sep 17, 2026
21	AF Switchgear	Strong evidence	Sutton-in-ashfield, United KingdomHQ checked Sep 17, 2026	201-500	117 contacts →
	Strong evidence “AF Switchgear is one of the UK's largest switchgear manufacturers and set the standard for LV Switchgear and Power Distribution.” Source: RevenueBase Database · checked Sep 17, 2026
22	TES Group	Partial evidence	Cookstown, United KingdomHQ checked Sep 17, 2026	51-200	116 contacts →
	Partial evidence “TES are Mechanical & Electrical Specialists, working to the highest standard of engineering excellence.” Source: RevenueBase Database · checked Sep 17, 2026
23	LJJ LTD	Indirect evidence	Stockton On Tees, United KingdomHQ checked Sep 17, 2026	201-500	114 contacts →
	Indirect evidence “LJJ formed in 2001 as a private limited company and is a multi-disciplined organisation capable of completing major mechanical, electrical and public health service contracts in a…” Source: RevenueBase Database · checked Sep 17, 2026
24	Darke & Taylor LTD	Indirect evidence	Oxfordshire, United KingdomHQ checked Sep 17, 2026	51-200	112 contacts →
	Indirect evidence “Our mission is to excel in the design, installation and maintenance of the electro-technical systems that connect to create fit for purpose building environments.” Source: RevenueBase Database · checked Sep 17, 2026
25	Excalon LTD	Indirect evidence	Salford, United KingdomHQ checked Sep 17, 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 17, 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: power distribution engineering 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 power distribution engineering companies.
Partial evidence: Its own public description names part of power distribution engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name power distribution engineering 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 2,572 power distribution engineering companies based in the United Kingdom

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Power distribution engineering companies based in the United Kingdom at a glance

As of Sep 17, 2026

34.0%Verified-email coverage

11.3Average contacts per company

1-10Median size (employees)

6.1%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,315

11-50

968

51-200

196

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 2,572 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 power distribution engineering 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 “power distribution engineering 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 power distribution engineering 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 power distribution engineering 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, 9,918 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 17, 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.

Power distribution engineering companies by metro

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 power distribution engineering 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 power distribution engineering companies are there based in the United Kingdom?

RevenueBase identified 2,572 power distribution engineering 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?

SP Energy Networks, headquartered in Glasgow, tops this list with the largest team on record.

Which city has the most power distribution engineering companies?

London leads with 158 headquartered companies, followed by Manchester (51) and Nottingham (32).

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 9,918 verified decision-maker contacts tracked across these 2,572 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 17, 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.