Company lists · Data refreshed September 2026

Top 25 Network infrastructure contractors based in the United Kingdom

Name: Network 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 17, 2026 765 companies tracked

RevenueBase identified 765 network infrastructure contractors headquartered in the United Kingdom as of September 2026 and tracks 10,997 professional contacts across them, including 3,809 with verified work emails. London is the largest hub.

This list covers network 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 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

765Companies

10,997Contacts tracked

3,809Verified emails

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The 25 largest network infrastructure contractors based in the United Kingdom

Ranked by team size

Top 25 of 765 network infrastructure contractors 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 network 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	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
2	WHP Telecoms Limited	Strong evidence	Warrington, United KingdomHQ checked Sep 17, 2026	501-1,000	519 contacts →
	Strong evidence “WHP is one of the UK's leading suppliers of network infrastructure services.” Source: RevenueBase Database · checked Sep 17, 2026
3	Indigo	Strong evidence	Magor, United KingdomHQ checked Sep 17, 2026	201-500	470 contacts →
	Strong evidence “Indigo engineers a digital future by designing, deploying, and supporting digital infrastructure for network owners and operators.” Source: RevenueBase Database · checked Sep 17, 2026
4	Morrison Telecom Services	Partial evidence	Stevenage, United KingdomHQ checked Sep 17, 2026	501-1,000	339 contacts →
	Partial 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 17, 2026
5	Magdalene	Indirect evidence	St Ives, United KingdomHQ checked Sep 17, 2026	201-500	273 contacts →
	Indirect evidence “Magdalene provides comprehensive independent solutions which address the individual needs of our customers throughout the Telecommunications Industry.” Source: RevenueBase Database · checked Sep 17, 2026
6	John Henry Group	Indirect evidence	Cambridge, United KingdomHQ checked Sep 17, 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 17, 2026
7	Viberoptix	Partial evidence	Coalisland, United KingdomHQ checked Sep 17, 2026	501-1,000	158 contacts →
	Partial evidence “Viberoptix delivers frontline services to fibre networks providers across the UK and Ireland.” Source: RevenueBase Database · checked Sep 17, 2026
8	Beacon Comms	Indirect evidence	Tavistock, United KingdomHQ checked Sep 17, 2026	201-500	151 contacts →
	Indirect evidence “Beacon Comms is the trading name of Beacon Communication Services Ltd.” Source: RevenueBase Database · checked Sep 17, 2026
9	Fulcrum Group	Partial evidence	Sheffield, United KingdomHQ checked Sep 17, 2026	201-500	145 contacts →
	Partial evidence “Fulcrum is a leading ICP (Independent Connection Provider) designing and building electricity, gas and water connections and infrastructure for all sizes of residential…” Source: RevenueBase Database · checked Sep 17, 2026
10	Block Solutions	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	141 contacts →
	Indirect evidence “Block was created for one reason: to empower people and inspire change through technology.” Source: RevenueBase Database · checked Sep 17, 2026
11	Freshwave	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	134 contacts →
	Partial evidence “The networks of the future are here.” Source: RevenueBase Database · checked Sep 17, 2026
12	Cass Worldwide	Indirect evidence	Snitterfield, United KingdomHQ checked Sep 17, 2026	201-500	134 contacts →
	Indirect evidence “CASS (Cabling and Splicing Services) is a services driven telecommunications specialist business.” Source: RevenueBase Database · checked Sep 17, 2026
13	Doocey Group	Strong evidence	Tipton, United KingdomHQ checked Sep 17, 2026	201-500	105 contacts →
	Strong evidence “Doocey Group Utility Infrastructure Contractor operating nationally in the construction Industry.” Source: RevenueBase Database · checked Sep 17, 2026
14	Waldon Telecom	Partial evidence	West Byfleet, United KingdomHQ checked Sep 17, 2026	51-200	93 contacts →
	Partial evidence “Providing high quality, dedicated telecom infrastructure services to Operators across the country.” Source: RevenueBase Database · checked Sep 17, 2026
15	Linbrooke Services LTD	Strong evidence	Sheffield, United KingdomHQ checked Sep 17, 2026	201-500	89 contacts →
	Strong evidence “We connect people, technologies and locations, enabling service providers, OEM's and internet service providers to deploy, scale, support and maintain network infrastructure…” Source: RevenueBase Database · checked Sep 17, 2026
16	OCU Opals	Indirect evidence	Peterborough, United KingdomHQ checked Sep 17, 2026	201-500	87 contacts →
	Indirect evidence “In August 2022, Opals Group was acquired by OCU Group.” Source: RevenueBase Database · checked Sep 17, 2026
17	Switchshop Limited	Partial evidence	Kimpton, United KingdomHQ checked Sep 17, 2026	51-200	79 contacts →
	Partial evidence “Switchshop is a specialist designer, installer and provider of IT network equipment solutions and one of the UK's leading resellers of networking hardware.” Source: RevenueBase Database · checked Sep 17, 2026
18	Rapid Response Telecoms LTD	Indirect evidence	Barnsley, United KingdomHQ checked Sep 17, 2026	201-500	79 contacts →
	Indirect evidence “As a family run business for over 30 years, here at Rapid Response Telecoms we take great pride in our services being a tier 1 supplier to many prestigious Alt Nets.” Source: RevenueBase Database · checked Sep 17, 2026
19	Novo Technologies Limited	Strong evidence	Irvine, United KingdomHQ checked Sep 17, 2026	51-200	79 contacts →
	Strong evidence “Providing World-class Communication Network and Security Infrastructure Solutions Novo Technologies is dedicated to projects excellence, Novo Technologies undertakes end to end…” Source: RevenueBase Database · checked Sep 17, 2026
20	ISG Tech	Partial evidence	Nelson, United KingdomHQ checked Sep 17, 2026	201-500	76 contacts →
	Partial evidence “ISG Tech is a market-leading provider of services for the design, deployment and management of enterprise network connectivity with over 35 years of experience.” Source: RevenueBase Database · checked Sep 17, 2026
21	Installation Technology Limited	Indirect evidence	Reading, United KingdomHQ checked Sep 17, 2026	51-200	74 contacts →
	Indirect evidence “Installation Technology has over thirty years of experience in providing technical solutions in advanced communication systems.” Source: RevenueBase Database · checked Sep 17, 2026
22	Sitec Infrastructure Services LTD	Strong evidence	Waterbeach, United KingdomHQ checked Sep 17, 2026	51-200	68 contacts →
	Strong evidence “Sitec Infrastructure Services is a dynamic, delivery-focussed company providing Mobile infrastructure ADC services and Fixed/Fibre E2E network delivery capabilities.” Source: RevenueBase Database · checked Sep 17, 2026
23	GCU UK LTD	Strong evidence	Bellshill, United KingdomHQ checked Sep 17, 2026	51-200	67 contacts →
	Strong evidence “Utilities, Telecoms & Civils Infrastructure Delivery \| Safe, Reliable & Scalable Project Delivery Across the UK GCU (UK) Ltd is a specialist contractor delivering utilities…” Source: RevenueBase Database · checked Sep 17, 2026
24	AMARO	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	64 contacts →
	Strong evidence “A Network Rail Principal Contractor and partner of choice for some of the biggest names in rail, we deliver integrated signalling, power, and telecoms solutions throughout the UK…” Source: RevenueBase Database · checked Sep 17, 2026
25	Leviton Network Solutions Europe	Strong evidence	Glenrothes, United KingdomHQ checked Sep 17, 2026	201-500	63 contacts →
	Strong evidence “Leviton Network Solutions Europe supports commercial and residential networks with high-performance network infrastructure.” 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: network 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 network infrastructure contractors.
Partial evidence: Its own public description names part of network infrastructure contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name network 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 765 network infrastructure contractors based in the United Kingdom

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Network infrastructure contractors based in the United Kingdom at a glance

As of Sep 17, 2026

34.6%Verified-email coverage

14.4Average contacts per company

11-50Median size (employees)

10.1%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

355

11-50

257

51-200

111

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 765 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 network 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 “network 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 network 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 network 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, 3,809 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.

Network infrastructure contractors by metro

Network infrastructure contractors in London77

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 network 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 network infrastructure contractors are there based in the United Kingdom?

RevenueBase identified 765 network 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?

Kelly Group, headquartered in Wembley, tops this list with the largest team on record.

Which city has the most network infrastructure contractors?

London leads with 77 headquartered companies, followed by Birmingham (15) and Manchester (15).

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 3,809 verified decision-maker contacts tracked across these 765 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.