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Telecoms Infrastructure Companies in Cardiff: 40 Active Firms (2026)
Telecoms infrastructure companies in Cardiff build, install and maintain network assets for carriers, landlords and enterprises across the city region.
Buying centres tend to sit with carrier network-delivery teams, enterprise IT and facilities functions, public-sector estates, and property owners managing tenant connectivity. Work is usually won around discrete build or maintenance projects: fibre installation, ducting, rooftop and mast access, in-building cabling, wireless coverage and ongoing network support. The commercial shape is closer to field-engineering services than high-volume resale, so buyers will often test delivery capacity, accreditations, response times and project governance before appointing a supplier. For this Cardiff cohort, the most relevant customers are likely to be carriers, landlords, larger local employers and public bodies needing practical infrastructure coverage across the city region.
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Cardiff has 40 actively trading telecoms infrastructure firms in this list, making it a compact local cohort rather than a deep national cluster. Reported employment totals 138 people, which points to a contractor-heavy market where a small change in project flow can alter visible capacity. The profile is also skewed towards smaller delivery organisations: only 2 firms report turnover above £5M, while 6 have been incorporated since 2022. For researchers, that makes Cardiff a place to check operational fit carefully, especially where work requires field crews, planned maintenance and hand-offs with carrier or property teams.
Street works, wayleaves and building access shape the operating context more than product regulation alone. Cardiff suppliers that install or maintain fixed-line, mobile, fibre, wireless, cabling, ducting, mast, rooftop or in-building networks sit between carriers, property owners and end customers, so delivery risk often depends on permissions, site access and coordination with existing assets. Public-sector and enterprise buyers will also care about resilience, service levels and safety procedures, particularly where connectivity supports operational buildings. The market structure therefore favours firms able to combine civil or in-building delivery with project management and post-install support, rather than firms that only broker connectivity.
Future demand appears likely to track practical upgrade cycles rather than a single adoption wave. Cardiff has a visible base of delivery firms, but many look closer to contractor or specialist-engineering businesses than venture-style scale-ups. That tends to make consolidation plausible where owners want broader coverage, access to trained field teams or better utilisation of equipment. Margins may remain exposed to procurement pressure from carriers, landlords and public bodies, while smaller firms can still defend positions through local access knowledge, responsiveness and familiarity with mixed property estates.
40
Active firms
2026
2
£5M+ firms
reported turnover
6
New incorporations
since 2022
Key facts
About 5% of the trading cohort reports turnover above £5M (2 of 40 firms) — the rest sits below that revenue band.
15% of the cohort was incorporated since 2022 (6 firms), so a sizeable share is in its first few filing cycles.
Work typically spans fixed networks, mobile sites and in-building connectivity for carriers, landlords and enterprise buyers.
Procurement tends to sit near property upgrades, managed services contracts and carrier roll-outs rather than pure software buying.
The buyer universe includes owner-managed installers, specialist maintenance firms and regional network-services operators.
Top Cardiff Telecoms Infrastructure companies
OPENRAN LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsServes mobile network operators, telecom service providers, and RAN hardware/software vendors involved in 2G, 3G, 4G and 5G network deployments.
Financial Health
HealthyHealthy · -7% CAGR over 4y
Location
Titan Smart Ltd
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy
Location
VIRTUSER BUSINESS COMMUNICATIONS SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides telecommunications consultancy and technology services including MVNO and MVNE support, private 5G/LTE network deployment, IoT connectivity, asset and vehicle tracking solutions, and mobile…
Serves telecoms operators, MVNOs/MVNEs, IoT businesses, event organisers, local authorities, and organisations needing private 5G/LTE connectivity for rural sites, vehicles, smart cities, agritech,…
Financial Health
StableStable
Location
3R's IT Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
DESHTE LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
LAYTEL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed · 0% CAGR over 4y
Location
Best Telecom Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · Hiring · 32% CAGR over 4y
Location
ADVANCED SATELLITE SOLUTIONS LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides network infrastructure and communications installation services, including Cat5e and Cat6 data cabling, LAN and WAN setup, fibre optic links, wireless networks, IP CCTV systems, and aerial…
Serves businesses of all sizes needing communications, network cabling, CCTV, wireless and connectivity infrastructure, with additional aerial installation services for domestic and commercial…
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 3y
Location
Portman Electronics Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides electrical and integrated communication and security systems including nurse call and dementia call systems, IP telephone systems, access control, CCTV, fire alarms, emergency lighting,…
Serves B2B customers in the UK care industry, particularly major care home providers and residential care facilities needing integrated building systems support.
Financial Health
StableStable · 0% CAGR over 4y
Location
MJCO LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong
Location
Comm-Tech Voice & Data
Trajectory
4y · 2020–NowFinancial sub-scores
Computed from 4 filingsProvides business communications and IT services including VoIP and hosted telephony, phone systems, broadband and leased line connectivity, managed Wi‑Fi and SD‑WAN, mobile solutions, Microsoft 365…
Sells to UK businesses needing integrated communications, connectivity, IT support and cyber security. Serves organisations seeking business telephony, broadband, mobile, Microsoft 365, IoT and…
Financial Health
DistressedDistressed
Location
TUGBURY LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides design, installation and maintenance of data and communications networks, including structured cabling and fibre optic systems. Also installs security and access control, air conditioning,…
Serves businesses of all sizes, commercial property owners and industrial sites across South Wales, including offices, manufacturing facilities, utilities, business parks and serviced workspace…
Financial Health
HealthyHealthy · -68% CAGR over 4y
Location
G Force Telecomms Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides telecommunications infrastructure services including overhead cable installation, fibre splicing, network build and maintenance, vacuum excavation, civil engineering, and surveying and…
Sells to telecoms operators, infrastructure contractors, and civil engineering firms needing network build, installation, and maintenance services. Also serves telecoms and civil engineering…
Financial Health
StrongStrong · Growing, Hiring · 30% CAGR over 4y
Location
BA Cheshire Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
DistressedDistressed
Location
A.S.M Networks Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides network infrastructure installation and support services, including structured data cabling, fibre optic cabling, Wi‑Fi network setup and maintenance, electrical installations, audio‑visual…
Serves businesses and organisations across the UK with sites or projects requiring network infrastructure, data cabling, fibre, Wi‑Fi, electrical, AV, CCTV and security support.
Financial Health
DistressedDistressed · 0% CAGR over 4y
Location
R F BUILDING & UTILITIES LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides multi-utility installation and civil engineering services for telecoms and energy networks, including fibre optic installation, cable blowing and splicing, HV and LV cable laying and…
Serves B2B utility and telecoms customers, including network operators, fibre broadband providers, developers and contractors needing multi-utility, FTTP/MDU, HV/LV and civils project delivery…
Financial Health
StrongStrong · Growing, Hiring · 73% CAGR over 4y
Location
Clear Stream Technology Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides data centre and business continuity hosting, virtual private cloud servers, and high‑speed internet connectivity. Offers data transit services, private fibre networks between sites, and WAN…
Serves businesses in South Wales and Cardiff needing IT continuity, high-bandwidth connectivity and cloud infrastructure, including media companies, data centres and multi-branch organisations with…
Financial Health
StrongStrong · Growing · 0% CAGR over 3y
Location
Lg Networks & Civils Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides civil engineering and infrastructure works for utilities and public sector projects, including highway and footway construction, drainage works, traffic management, telecommunications…
Serves public-sector bodies, utilities and private-sector contractors on highways, drainage, water mains and telecommunications infrastructure projects, as a main contractor or subcontractor.
Financial Health
StrongStrong · Hiring · 11% CAGR over 4y
Location
S&M Infrastructure Services Ltd
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
HealthyHealthy · Hiring · 33% CAGR over 1y
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy
Location
TWISTED PAIR TECHNOLOGIES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs data and communication network infrastructure including Cat5e/Cat6 cabling, fibre optic networks, wireless links and Wi‑Fi systems. Also provides CCTV, access control, telephone…
Serves businesses and public sector organisations, including contractors, councils, hospitals, hotels, schools, IT companies and industrial sites across the UK.
Financial Health
WeakWeak · -12% CAGR over 4y
Location
Phonelink Installations Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsInstalls and maintains communication infrastructure including structured copper and fibre optic data cabling networks and hosted cloud-based telephone systems. Provides telecommunications…
Serves businesses and public sector organisations needing telecoms and data cabling installations, including offices, schools, hospitals and public service stations. Targets end users from…
Financial Health
StableStable · 0% CAGR over 4y
Location
JIGA HERTZ ELECTRICAL ENGINEERING AND GENERAL SERVICES LIMITED
Trajectory
3y · 2021–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StrongStrong · Growing · 0% CAGR over 3y
Location
JMP Telecoms Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
WeakWeak · -31% CAGR over 3y
Location
B&C Telecoms Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StrongStrong
Location
DAH Telecoms Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StrongStrong
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
COMTEC TELECOM AND DATA LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides network cabling installation including copper and fibre optic systems, business telephone systems and hosted VoIP solutions, broadband and leased line connectivity, and security…
Serves B2B customers, primarily businesses needing telecoms, data connectivity, network infrastructure and security system support for their premises.
Financial Health
StrongStrong · Hiring · 15% CAGR over 4y
Location
Morecom Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable
Location
NTEC (BRISTOL) LIMITED
Trajectory
5y · 2021–NowFinancial Health
Insufficient historyInsufficient history
Location
One Vision Digital Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides installation, maintenance and repair of TV aerials, satellite systems and communal television distribution systems, including IRS, SMATV and IPTV. Also installs TV wall mounts and data…
Serves homeowners and residential property owners, plus businesses and housing providers including offices, hotels, pubs, gyms, universities, student accommodation operators and public housing…
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 4y
Location
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How Cardiff Telecoms Infrastructure companies work and how to sell to them
What they do
Cardiff telecoms infrastructure firms usually earn revenue from project delivery, maintenance retainers and specialist field support rather than from pure connectivity resale. A typical engagement might cover survey work, installation, civils coordination, cabling, testing, fault response or planned upgrades, with pricing set by day rates, project scopes, service-level commitments or call-out terms. Margins depend on crew utilisation, subcontractor control, access permissions and how accurately site conditions are priced before work starts. The offer is often a mix of physical infrastructure work and technical assurance, so buyers tend to value evidence of safe delivery, clean documentation and the ability to hand over assets without creating operational debt.
Who they sell to
Most sell to carriers, managed service providers, commercial landlords, construction and fit-out teams, public-sector estates, and larger employers with distributed premises. The practical buyers are often network delivery managers, IT infrastructure heads, facilities directors, procurement teams and project managers responsible for site readiness. Smaller jobs can move through direct relationships and repeat call-offs, while larger builds tend to involve formal scopes, supplier onboarding, risk assessments and staged sign-off. Sales cycles are usually tied to build programmes, lease events, public works or network refresh budgets, which means suppliers need to show capacity, method statements and local delivery experience before price becomes the only discussion.
What they buy
Most Cardiff telecoms infrastructure firms tend to spend on tools that improve field coordination and proof of delivery: job scheduling, mobile workforce management, asset records, mapping, document control, fleet tracking, health and safety workflows, and customer reporting. Finance and operations teams may also need quoting, job-costing, payroll, subcontractor management, stock control and service-desk software where maintenance work is recurring. Physical spend often sits with vans, test equipment, cabling stock, access equipment, protective kit and specialist training. Professional services are more likely to cover accounting, insurance, contract review, accreditations, bid support and recruitment for engineers or project supervisors than broad brand marketing.
Why and how to sell to them
Telecoms infrastructure buyers tend to evaluate suppliers when project volume rises, a new carrier or public-sector contract lands, field capacity becomes stretched, or existing systems make close-out evidence hard to manage. Common pain points include missed access windows, rework after poor surveys, slow job documentation, subcontractor visibility and disputes over variations. Outbound works better when it is specific to field delivery economics: fewer repeat visits, faster sign-off, clearer audit trails, safer site processes or better utilisation of crews and equipment. Triggers worth watching include hiring for field managers, tender activity, fleet expansion, new premises and ownership changes that may bring tighter reporting expectations.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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Frequently asked questions
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