Company lists · Data refreshed September 2026

Top 25 IT infrastructure installation companies based in the United Kingdom

Name: IT infrastructure installation 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 20, 2026 405 companies tracked

RevenueBase identified 405 IT infrastructure installation companies headquartered in the United Kingdom as of September 2026 and tracks 6,171 professional contacts across them, including 2,236 with verified work emails. London is the largest hub.

This list covers IT infrastructure installation 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 20, 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 20, 2026 86% judged on-target in blind review

405Companies

6,171Contacts tracked

2,236Verified emails

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The 25 largest IT infrastructure installation companies based in the United Kingdom

Ranked by team size

Top 25 of 405 IT infrastructure installation companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to IT infrastructure installation 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	Kelly Group	Indirect evidence	Wembley, United KingdomHQ checked Sep 20, 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 20, 2026
2	ONNEC	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	585 contacts →
	Strong evidence “Onnec is a leading partner for IT Infrastructure design, installation and operational support services.” Source: RevenueBase Database · checked Sep 20, 2026
3	Redstone Converged Solutions	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	453 contacts →
	Indirect evidence “Redstone is now part of RedstoneConnect PLC.” Source: RevenueBase Database · checked Sep 20, 2026
4	Sudlows	Partial evidence	Manchester, United KingdomHQ checked Sep 20, 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 20, 2026
5	Vohkus	Strong evidence	Fareham, United KingdomHQ checked Sep 20, 2026	51-200	184 contacts →
	Strong evidence “Vohkus is a rapidly growing, highly agile UK IT supplier specialising in end-to-end IT supply, enterprise infrastructure solutions, and comprehensive managed services.” Source: RevenueBase Database · checked Sep 20, 2026
6	Datalec Precision Installations Limited	Partial evidence	Buntingford Herts, United KingdomHQ checked Sep 20, 2026	51-200	178 contacts →
	Partial evidence “OFFICIAL ACCOUNT* Datalec Precision Installations provides world-class data centre design, build, and installation services that leverage unique technical expertise, including…” Source: RevenueBase Database · checked Sep 20, 2026
7	LMG Lmgiq.com	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	153 contacts →
	Partial evidence “For 40 years, LMG has delivered secure, resilient and proven digital infrastructure solutions across the built environment.” Source: RevenueBase Database · checked Sep 20, 2026
8	Block Solutions	Indirect evidence	London, United KingdomHQ checked Sep 20, 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 20, 2026
9	Deepscale Technologies LTD	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	141 contacts →
	Partial evidence “Deepscale Technologies provide data center, enterprise & managed IT solutions across the globe that enhance how businesses operate.” Source: RevenueBase Database · checked Sep 20, 2026
10	Linbrooke Services LTD	Partial evidence	Sheffield, United KingdomHQ checked Sep 20, 2026	201-500	89 contacts →
	Partial 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 20, 2026
11	Redex IT Limited	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	89 contacts →
	Partial evidence “Ultimate IT solutions.” Source: RevenueBase Database · checked Sep 20, 2026
12	Technimove	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	87 contacts →
	Indirect evidence “We are Technimove.” Source: RevenueBase Database · checked Sep 20, 2026
13	CST	Indirect evidence	Wooburn Green, United KingdomHQ checked Sep 20, 2026	51-200	76 contacts →
	Indirect evidence “CST is an I.T.” Source: RevenueBase Database · checked Sep 20, 2026
14	ADM Computing	Partial evidence	Canterbury, United KingdomHQ checked Sep 20, 2026	51-200	72 contacts →
	Partial evidence “ADM Computing is an independent, family-owned IT services provider headquartered in Canterbury, supporting organisations across Kent, London and the South East since 1984.” Source: RevenueBase Database · checked Sep 20, 2026
15	Cloudbox	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	60 contacts →
	Strong evidence “We build and maintain a highly secure, compliant IT infrastructure for our clients – with total peace of mind – so they can focus on the market.” Source: RevenueBase Database · checked Sep 20, 2026
16	FNG Fortitude Nicsa Global LTD	Partial evidence	Derby, United KingdomHQ checked Sep 20, 2026	51-200	51 contacts →
	Partial evidence “Fortitude Nicsa Global (FNG) is a leading provider of comprehensive IT services, supporting businesses in over 160 countries with innovative, 24/7 solutions.” Source: RevenueBase Database · checked Sep 20, 2026
17	Kinetic IT LTD	Partial evidence	Erith, United KingdomHQ checked Sep 20, 2026	11-50	47 contacts →
	Partial evidence “It’s all about making a difference The world of IT is an ever-evolving industry with new developments in technology emerging constantly.” Source: RevenueBase Database · checked Sep 20, 2026
18	Bluekong Networks	Partial evidence	Theale, United KingdomHQ checked Sep 20, 2026	51-200	42 contacts →
	Partial evidence “BlueKong Networks is an International technical engineering services provider; an agile, customer-focused provider of end-to-end next generation IT and Network services.” Source: RevenueBase Database · checked Sep 20, 2026
19	Select Technology	Partial evidence	Paddock Wood, United KingdomHQ checked Sep 20, 2026	11-50	40 contacts →
	Partial evidence “Select Technology is one of the South East’s leading technology service providers, with 30 years of expertise in designing, implementing and supporting IT networks of all sizes.” Source: RevenueBase Database · checked Sep 20, 2026
20	Phoenix47	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	40 contacts →
	Strong evidence “Phoenix47 is an IT infrastructure services company providing Support Desk, Managed Services and Professional Services.” Source: RevenueBase Database · checked Sep 20, 2026
21	Phoenix Trescray	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Strong evidence “We are a leading IT installation company offering complete infrastructure solutions within data centre and commercial sectors.” Source: RevenueBase Database · checked Sep 20, 2026
22	Aceda Limited	Strong evidence	Thornaby, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Strong evidence “Established in 1991, ACEDA are a leading provider of IT Infrastructure’s, Security Systems, Electrical & Instrumentation and Smart Building Technologies.” Source: RevenueBase Database · checked Sep 20, 2026
23	Excel IT	Strong evidence	Grays, United KingdomHQ checked Sep 20, 2026	201-500	35 contacts →
	Strong evidence “Excel builds, supports and optimises the IT infrastructure, networks and connectivity which drive global business performance.” Source: RevenueBase Database · checked Sep 20, 2026
24	Tech Services Global	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	35 contacts →
	Partial evidence “Ultimate IT Solutions.” Source: RevenueBase Database · checked Sep 20, 2026
25	Talkwire	Strong evidence	Melksham, United KingdomHQ checked Sep 20, 2026	51-200	34 contacts →
	Strong evidence “Experts for Physical IT Installations Nationwide Whether building network cabinets, fitting devices, integrating complex IT systems, or installing professional IT infrastructure…” Source: RevenueBase Database · checked Sep 20, 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: IT infrastructure installation 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 IT infrastructure installation companies.
Partial evidence: Its own public description names part of IT infrastructure installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT infrastructure installation 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 405 IT infrastructure installation companies based in the United Kingdom

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IT infrastructure installation companies based in the United Kingdom at a glance

As of Sep 20, 2026

36.2%Verified-email coverage

15.2Average contacts per company

1-10Median size (employees)

20.2%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

204

11-50

139

51-200

201-500

501-1,000

1,001-5,000

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 405 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 IT infrastructure installation 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 “IT infrastructure installation 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 IT infrastructure installation 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 IT infrastructure installation 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, 2,236 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 20, 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.

IT infrastructure installation companies by metro

IT infrastructure installation companies in London82

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 IT infrastructure installation 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 IT infrastructure installation companies are there based in the United Kingdom?

RevenueBase identified 405 IT infrastructure installation 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?

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

Which city has the most IT infrastructure installation companies?

London leads with 82 headquartered companies, followed by Manchester (7) and Nottingham (7).

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 2,236 verified decision-maker contacts tracked across these 405 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 20, 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.