Company lists · Data refreshed November 2026

Top 23 Grid infrastructure engineering firms based in the United Kingdom

RevenueBase identified 832 company matches for grid infrastructure engineering firms associated with the United Kingdom as of November 2026 and tracks 21,861 professional contacts across them, including 8,637 with verified work emails. London is the largest hub.

This list covers company matches for grid infrastructure engineering firms associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
832Companies
21,861Contacts tracked
8,637Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 23 largest grid infrastructure engineering firms based in the United Kingdom

Ranked by team size
Top 23 of 832 company matches for grid infrastructure engineering firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,0003,366 contacts →

Exact match

“Murphy is a leading international, multi-disciplined engineering and construction company founded in 1951 that improves life by delivering world-class infrastructure.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchStockport, United KingdomHQ recorded Nov 6, 20261,001-5,0001,773 contacts →

Exact match

“OCU provides end-to-end infrastructure engineering in the utilities, digital, and energy markets, specialising in safely and efficiently delivering complex client requirements.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,0001,172 contacts →

Exact match

“Faithful+Gould is now AtkinsRéalis.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,000760 contacts →

Exact match

“Aureos is a multi-disciplinary energy, transport networks specialist and engineering services provider, spanning the design, engineering, installation, maintenance, and crisis…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLeeds, United KingdomHQ recorded Nov 6, 20261,001-5,000740 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchCoatbridge, United KingdomHQ recorded Nov 6, 2026501-1,000337 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLoughborough, United KingdomHQ recorded Nov 6, 2026501-1,000229 contacts →

Exact match

“We support the global drive to net zero with innovative, engineered solutions that address grid resilience and systems challenges, facilitate electrification of transport and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchBirmingham, United KingdomHQ recorded Nov 6, 2026501-1,000226 contacts →

Exact match

“At Actemium UK, we are expert electrical, automation and mechanical engineers delivering bespoke engineering solutions across industry, infrastructure and beyond.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchRochdale, United KingdomHQ recorded Nov 6, 2026501-1,000198 contacts →

Exact match

“P.N.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200172 contacts →

Exact match

“Rendel celebrated its 185th Anniversary in 2024, making us one of the oldest civil and structural engineering companies in the UK.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchSwavesey, United KingdomHQ recorded Nov 6, 2026201-500144 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchBristol, United KingdomHQ recorded Nov 6, 202651-200129 contacts →

Exact match

“Powered by People.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBraintree, United KingdomHQ recorded Nov 6, 202651-200128 contacts →

Exact match

“About Swann Engineering Group Founded in 1974, Swann Engineering Group specializes in delivering turnkey solutions for complex engineering challenges.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSmall Dole, United KingdomHQ recorded Nov 6, 202651-200128 contacts →

Exact match

“Mackley provides a comprehensive range of services from conception through construction to project delivery.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchSalford, United KingdomHQ recorded Nov 6, 2026201-500114 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchBromsgrove, United KingdomHQ recorded Nov 6, 202651-200110 contacts →

Exact match

“Rock Power Connections are experts in electrical connections with a proven track record of quality and safety.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchPembroke Dock, United KingdomHQ recorded Nov 6, 202651-20096 contacts →

Exact match

“InSite Technical Services is the partner you can rely on to support any engineering requirement.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBury St Edmunds, United KingdomHQ recorded Nov 6, 202611-5080 contacts →

Exact match

“Dunamis is a leading Independent Connection Provider (ICP) with a rich history in delivering High Voltage (HV) connections, nationwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchAshby-de-la-zouch, United KingdomHQ recorded Nov 6, 202651-20078 contacts →

Exact match

“Premtech is a dynamic company whose primary focus is to provide engineering, consultancy and design management services to all companies involved in the development and ownership…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchOmagh, United KingdomHQ recorded Nov 6, 202651-20078 contacts →

Exact match

“The Adman group of companies is a leading provider of civil engineering and construction services with a proven track record of service delivery for both public and private sector…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchBraintree, United KingdomHQ recorded Nov 6, 202651-20072 contacts →

Exact match

“Securing your power needs to deliver your electrification plans with certainty.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchManchester, United KingdomHQ recorded Nov 6, 202611-5071 contacts →

Exact match

“IPEC Limited was founded in 1995 with the objective of transferring cutting-edge technology to the power industry by generating a dialogue between academic research, industry, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5069 contacts →

Exact match

“Chosen to deliver, trusted to care - for 30 years we’ve worked with clients across a diverse range of sectors to deliver safe and sustainable engineering solutions that prioritise…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 23 of 832 grid infrastructure engineering firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 8,637 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Grid infrastructure engineering firms based in the United Kingdom at a glance

As of Nov 6, 2026
39.5%Verified-email coverage
26.3Average contacts per company
11-50Median size (employees)
11.4%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
401
11-50
254
51-200
113
201-500
19
501-1,000
8
1,001-5,000
9
5,001-10,000
1
10001+
2

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 832 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “grid infrastructure engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 8,637 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “grid infrastructure engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many grid infrastructure engineering firms are there based in the United Kingdom?

RevenueBase identified 832 company matches for grid infrastructure engineering firms associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Murphy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most grid infrastructure engineering firms?

London leads with 95 company records, followed by Manchester (30) and Glasgow (13).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 8,637 professional contacts with verified work emails tracked across these 832 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.