Company lists · Data refreshed September 2026
Top 25 Defense communication system companies based in the United Kingdom
RevenueBase identified 68 defense communication system companies headquartered in the United Kingdom as of September 2026 and tracks 2,640 professional contacts across them, including 566 with verified work emails. London is the largest hub.
This list covers defense communication system 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 15, 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.
The 25 largest defense communication system companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 840 contacts → | ||||
Indirect evidence “Ultra Electronics” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 2 | 276 contacts → | ||||
Partial evidence “Chelton is the trusted name in aerospace and defence - where innovation meets reliability.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 3 | 173 contacts → | ||||
Strong evidence “ALL.SPACE isn’t just revolutionizing communication; we’re shaping the very future of defense operations, with the most advanced tactical multi-link mobility terminals-seamlessly…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 4 | 120 contacts → | ||||
Strong evidence “STS Defence, a part of the Cicor Group, is a UK-based engineering and technology company specialising in mission-critical, secure communications & networks, electronic warfare &…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 5 | 113 contacts → | ||||
Partial evidence “Steatite Ltd is a market leader in the design, production, test and supply of rugged industrial computers, MANET radio systems, advanced wideband antennas, and imaging…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 6 | 68 contacts → | ||||
Indirect evidence “MPG Europe delivers radio frequency (RF) spectrum-centric solutions at the speed of technology.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 7 | 51 contacts → | ||||
Partial evidence “Hytera is a leading global manufacturer of professional mobile radio communication equipment dedicated to bringing valuable solutions to many industries and clients across the…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 8 | 51 contacts → | ||||
Partial evidence “Enterprise Control Systems Ltd (ECS) is a specialist RF systems company that has for over 30 years continued to supply UK and international customers with innovative, leading…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 9 | 27 contacts → | ||||
Partial evidence “GRC is a fully independent limited company based in Hereford in the UK, specialising in the design and development of mission critical communication and situational awareness…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 10 | 23 contacts → | ||||
Indirect evidence “We design and manufacture technologically advanced and intelligent power amplifiers that help combat diverse and complex threats in dynamic, multi-domain electronic warfare (EW)…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 11 | 22 contacts → | ||||
Indirect evidence “We’re high speed, high frequency designers passionate about RF and digital technology.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 12 | 21 contacts → | ||||
Strong evidence “Spectra Group (UK) Ltd is a British communications engineering company delivering mission-critical tactical communications systems for defence and security organisations worldwide.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 13 | 19 contacts → | ||||
Strong evidence “For 30 years TES has deployed and maintained sophisticated communication systems.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 14 | 19 contacts → | ||||
Indirect evidence “We’re cellXica.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 15 | 18 contacts → | ||||
Indirect evidence “SMC Group - Est.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 16 | 13 contacts → | ||||
Strong evidence “World class microwave radio transmission products and solutions Westica Communications provides a true "One Stop Shop" for all types of wireless communication systems and services.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 17 | 13 contacts → | ||||
Partial evidence “G6 are industry leaders in the provision of radio and satellite voice and data communication solutions.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 18 | 10 contacts → | ||||
Strong evidence “Trilogy is a world class supplier of audio communications and infrastructure equipment to the Defense, Broadcast, Emergency Management, and Commercial and Industrial sectors.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 19 | 9 contacts → | ||||
Partial evidence “Every day our products touch the lives of millions of people as they silently perform their duty as mission critical components within the thousands of networks & systems that…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 20 | 9 contacts → | ||||
Partial evidence “DAC are a market-leading technology and engineering company, specialising in the design and manufacture of ruggedised communications equipment for use in arduous and critical…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 21 | 9 contacts → | ||||
Partial evidence “ReliaSat is a leading manufacturer of high frequency satellite communications technology, offering reliable, cutting-edge solutions for high data rate requirements.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 22 | 6 contacts → | ||||
Partial evidence “Founded in 1989 NRC Ltd (Northwest Radio Communications) provides radio communications solutions across the UK.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 23 | 5 contacts → | ||||
Partial evidence “CommsAudit develops and manufactures technologically advanced products including antennas, antenna distribution systems, Wide band receivers, HF-V/UHF collection systems, HF Super…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 contacts → | ||||
Indirect evidence “Designer and manufacture surveillance and counter-surveillance equipment.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
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: defense communication system 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 defense communication system companies.
- Partial evidence
- Its own public description names part of defense communication system companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name defense communication system 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 68 defense communication system companies based in the United Kingdom
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Defense communication system companies based in the United Kingdom at a glance
As of Sep 15, 2026Companies by employee count
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 68 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 defense communication system 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 “defense communication system 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 defense communication system 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 defense communication system 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, 566 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 15, 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.
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 defense communication system 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 defense communication system companies are there based in the United Kingdom?
RevenueBase identified 68 defense communication system 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?
Ultra Electronics Group, headquartered in London, tops this list with the largest team on record.
Which city has the most defense communication system companies?
London leads with 5 headquartered companies, followed by Swindon (4) and Shipley (3).
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 566 verified decision-maker contacts tracked across these 68 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 15, 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.
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