Company lists · Data refreshed September 2026

Top 25 Telecom infrastructure contractors based in the United Kingdom

Name: Telecom infrastructure contractors 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 947 companies tracked

RevenueBase identified 947 telecom infrastructure contractors headquartered in the United Kingdom as of September 2026 and tracks 19,474 professional contacts across them, including 6,454 with verified work emails. London is the largest hub.

This list covers telecom infrastructure contractors 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

947Companies

19,474Contacts tracked

6,454Verified emails

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The 25 largest telecom infrastructure contractors based in the United Kingdom

Ranked by team size

Top 25 of 947 telecom infrastructure contractors 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 telecom infrastructure contractors: 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	MJ Quinn	Indirect evidence	Prescot, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,126 contacts →
	Indirect evidence “At MJ Quinn we believe in creating great connections, with our customers, our people and our world.” Source: RevenueBase Database · checked Sep 19, 2026
2	Kelly Group	Indirect evidence	Wembley, United KingdomHQ checked Sep 19, 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 19, 2026
3	Helios Towers	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	784 contacts →
	Partial evidence “Helios Towers is a leading independent telecom tower company connecting people and powering growth across Africa and the Middle East.” Source: RevenueBase Database · checked Sep 19, 2026
4	Volkerrail LTD	Strong evidence	Doncaster, United KingdomHQ checked Sep 19, 2026	1,001-5,000	767 contacts →
	Strong evidence “Since entering the construction market in 1935, VolkerRail has become one of the UK’s leading multidisciplinary railway infrastructure contractors.” Source: RevenueBase Database · checked Sep 19, 2026
5	WHP Telecoms Limited	Partial evidence	Warrington, United KingdomHQ checked Sep 19, 2026	501-1,000	519 contacts →
	Partial evidence “WHP is one of the UK's leading suppliers of network infrastructure services.” Source: RevenueBase Database · checked Sep 19, 2026
6	Indigo	Partial evidence	Magor, United KingdomHQ checked Sep 19, 2026	201-500	470 contacts →
	Partial evidence “Indigo engineers a digital future by designing, deploying, and supporting digital infrastructure for network owners and operators.” Source: RevenueBase Database · checked Sep 19, 2026
7	Redstone Converged Solutions	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	453 contacts →
	Indirect evidence “Redstone is now part of RedstoneConnect PLC.” Source: RevenueBase Database · checked Sep 19, 2026
8	Comex 2000	Partial evidence	Derby, United KingdomHQ checked Sep 19, 2026	501-1,000	367 contacts →
	Partial evidence “Comex is an established major strategic partner of choice within the telecommunication sector, across the United Kingdom and Ireland, offering an end to end solution.” Source: RevenueBase Database · checked Sep 19, 2026
9	Maintel	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	341 contacts →
	Indirect evidence “Maintel is a communications managed services provider.” Source: RevenueBase Database · checked Sep 19, 2026
10	Morrison Telecom Services	Strong evidence	Stevenage, United KingdomHQ checked Sep 19, 2026	501-1,000	339 contacts →
	Strong evidence “Morrison Telecom Services is focused on the design, build and maintenance of telecom infrastructure for key clients in the fixed telecom market.” Source: RevenueBase Database · checked Sep 19, 2026
11	Clarke Telecom	Strong evidence	Manchester, United KingdomHQ checked Sep 19, 2026	201-500	312 contacts →
	Strong evidence “Clarke Telecom carries out every aspect of wireless telecoms network infrastructure delivery.” Source: RevenueBase Database · checked Sep 19, 2026
12	MAP Group UK	Indirect evidence	Middlesbrough, United KingdomHQ checked Sep 19, 2026	201-500	275 contacts →
	Indirect evidence “Map Group (UK) is one of the leading independent providers of professional technology services to the UK communications sector.” Source: RevenueBase Database · checked Sep 19, 2026
13	Magdalene	Partial evidence	St Ives, United KingdomHQ checked Sep 19, 2026	201-500	273 contacts →
	Partial evidence “Magdalene provides comprehensive independent solutions which address the individual needs of our customers throughout the Telecommunications Industry.” Source: RevenueBase Database · checked Sep 19, 2026
14	Sudlows	Partial evidence	Manchester, United KingdomHQ checked Sep 19, 2026	201-500	228 contacts →
	Partial evidence “Sudlows is a multi-award winning Critical Infrastructures, Enterprise Services and Facilities Management specialist which provides a full range of technical services for…” Source: RevenueBase Database · checked Sep 19, 2026
15	John Henry Group	Indirect evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	201-500	223 contacts →
	Indirect evidence “Founded in 1985, John Henry Group is a leading, national independent integrated services provider providing best in class expertise, enabling our partner clients to deliver…” Source: RevenueBase Database · checked Sep 19, 2026
16	IQA Elecnor	Strong evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	201-500	184 contacts →
	Strong 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 19, 2026
17	Viberoptix	Indirect evidence	Coalisland, United KingdomHQ checked Sep 19, 2026	501-1,000	158 contacts →
	Indirect evidence “Viberoptix delivers frontline services to fibre networks providers across the UK and Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
18	Beacon Comms	Indirect evidence	Tavistock, United KingdomHQ checked Sep 19, 2026	201-500	151 contacts →
	Indirect evidence “Beacon Comms is the trading name of Beacon Communication Services Ltd.” Source: RevenueBase Database · checked Sep 19, 2026
19	Freshwave	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	134 contacts →
	Indirect evidence “The networks of the future are here.” Source: RevenueBase Database · checked Sep 19, 2026
20	Cass Worldwide	Partial evidence	Snitterfield, United KingdomHQ checked Sep 19, 2026	201-500	134 contacts →
	Partial evidence “CASS (Cabling and Splicing Services) is a services driven telecommunications specialist business.” Source: RevenueBase Database · checked Sep 19, 2026
21	Genesis Technology Services Limited	Indirect evidence	Peterborough, United KingdomHQ checked Sep 19, 2026	501-1,000	132 contacts →
	Indirect evidence “Genesis Technology Services Limited (GTS Ltd) is a leading engineering service provider in the UK and a global multinational corporation, based in Cambridgeshire, UK.” Source: RevenueBase Database · checked Sep 19, 2026
22	Swann Engineering Group LTD	Indirect evidence	Braintree, United KingdomHQ checked Sep 19, 2026	51-200	123 contacts →
	Indirect 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 19, 2026
23	Doocey Group	Strong evidence	Tipton, United KingdomHQ checked Sep 19, 2026	201-500	105 contacts →
	Strong evidence “Doocey Group Utility Infrastructure Contractor operating nationally in the construction Industry.” Source: RevenueBase Database · checked Sep 19, 2026
24	Teligent Limited	Partial evidence	Reading, United KingdomHQ checked Sep 19, 2026	51-200	99 contacts →
	Partial evidence “With operations that span the United Kingdom, Teligent Limited is a dynamic infrastructure delivery and management consultancy servicing the biggest names in the UK…” Source: RevenueBase Database · checked Sep 19, 2026
25	Optilan	Indirect evidence	Royal Leamington Spa, United KingdomHQ checked Sep 19, 2026	201-500	95 contacts →
	Indirect evidence “Optilan is a leading independent security and communications systems integrator worldwide.” 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: telecom infrastructure contractors. 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 telecom infrastructure contractors.
Partial evidence: Its own public description names part of telecom infrastructure contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecom infrastructure contractors. 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 947 telecom infrastructure contractors based in the United Kingdom

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Telecom infrastructure contractors based in the United Kingdom at a glance

As of Sep 19, 2026

33.1%Verified-email coverage

20.6Average contacts per company

11-50Median size (employees)

10.6%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

387

11-50

351

51-200

147

201-500

501-1,000

1,001-5,000

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 947 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 telecom infrastructure contractors, 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 “telecom infrastructure contractors”. 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 telecom infrastructure contractors), 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 telecom infrastructure contractors, 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, 6,454 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.

Telecom infrastructure contractors by metro

Telecom infrastructure contractors in London100

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 telecom infrastructure contractors, 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 telecom infrastructure contractors are there based in the United Kingdom?

RevenueBase identified 947 telecom infrastructure contractors 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?

MJ Quinn, headquartered in Prescot, tops this list with the largest team on record.

Which city has the most telecom infrastructure contractors?

London leads with 100 headquartered companies, followed by Manchester (20) and Birmingham (18).

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 6,454 verified decision-maker contacts tracked across these 947 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.