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TIC Companies in Portsmouth: 66 Active Firms (2026)
Testing, inspection and certification companies assess products, systems and sites for conformity across Portsmouth and its surrounding metropolitan area.
Buying centres tend to sit with quality, engineering, facilities, procurement and compliance teams rather than with a single software-style budget holder. Portsmouth-area providers typically sell to small and mid-market manufacturers, marine and construction contractors, facilities operators, energy-service businesses and professional advisers who need evidence for audits, tender submissions or product approval. Engagements are often practical and recurring: calibration schedules, site inspections, management-system assessments, conformity files and remedial sign-off. A few contracts may be project-based around infrastructure or industrial assets, but many relationships depend on local response, accredited personnel and the ability to translate technical findings into documentation that a customer, insurer or public buyer can accept.
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Portsmouth has 66 TIC companies actively trading, a compact local cohort rather than a broad national cluster. The reported employment footprint is 472 people, which points to a market made up mainly of specialist teams rather than large labour pools. Only 2 firms report turnover above £5M, while 5 have been incorporated since 2022, so the list is weighted towards established small operators with a narrow tail of higher-revenue businesses. That shape fits the South Coast demand base: marine, construction, facilities and manufacturing clients need repeatable assurance work, but not always enterprise-scale supplier networks.
Accreditation sits close to the centre of this market because many customers are not buying an opinion; they are buying evidence that a competent body has followed an accepted conformity-assessment process. GOV.UK frames third-party accreditation as “checking the checkers”, and UK practice routes accreditation through the UK’s National Accreditation Body. Product-facing work also has to account for UKCA and CE marking regimes, with sector rules determining when third-party assessment is required. Bodies appointed for Great Britain or Northern Ireland sit within the market-conformity framework, so local providers that lack appointment or accreditation tend to work as subcontractors, advisers or inspection specialists rather than full certification authorities.
Portsmouth’s TIC base appears likely to remain service-led and relationship-led, with incremental demand tied to maintenance cycles, audit calendars and product-conformity requirements. The scarcity of larger revenue firms suggests fewer local scale-up platforms and more owner-managed specialists, which may favour partnerships and subcontracting over formal consolidation. Regulatory pressure tends to help accredited providers defend their role, but it also raises the cost of technical staff, quality systems and external assessment. Newer entrants may find openings in documentation-heavy niches and sector-specific inspection work, while broader certification authority status remains harder to reach without accumulated credentials and recurring volumes.
66
Active firms
2026
2
Above £5M
turnover threshold
5
Since 2022
new incorporations
Key facts
About 3% of the trading cohort reports turnover above £5M (2 of 66 firms) — the rest sits below that revenue band.
7% of the cohort was incorporated since 2022 (5 firms), so a sizeable share is in its first few filing cycles.
UKAS is the sole UK National Accreditation Body, appointed under the Accreditation Regulations 2009, and government policy says UK-operating organisations should seek accreditation through UKAS.
GOV.UK says UKCA and CE regimes cover more than 20 product types, with sector-specific rules deciding whether third-party assessment and marking are required.
OPSS says UK conformity assessment bodies seeking appointment as Approved Bodies for Great Britain or UK Notified Bodies for Northern Ireland are appointed by the Secretary of State and listed on the UK Market Conformity Assessment Bodies database.
Testing is commonly identified as the largest service line, while certification is commonly identified as the faster-growing service segment.
UKAS states that accreditation and accredited services are recognised internationally through European and global accreditation groups, helping reduce repeated assessments and technical barriers to trade.
Top Portsmouth TIC companies
U D TEST & INSPECTION LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides non-destructive testing and inspection services including radiographic testing, ultrasonic inspection and immersion testing, magnetic particle and liquid penetrant testing, and positive…
Serves B2B and infrastructure clients in oil and gas, nuclear, marine/submarine, wind energy, construction and structural steel, including pipeline operators, bridge/stadium contractors, crane…
Financial Health
StrongStrong
Location
ENV Surveys Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides asbestos consultancy services including management, refurbishment and demolition surveys, asbestos sample testing and laboratory analysis, air monitoring and four-stage clearance testing.…
Serves commercial and industrial property clients, duty holders and facilities managers, plus domestic homeowners needing asbestos compliance support across London, the South East and wider UK.
Financial Health
HealthyHealthy · Hiring · 3% CAGR over 3y
Location
Gully Howard Technical Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides property and workplace surveying including asbestos surveys, air monitoring, material analysis, stock condition and energy surveys. Also delivers occupational hygiene assessments,…
Serves a mix of B2B and B2C customers: housing associations and residents, private individuals, large housing providers, employers, and organisations needing surveying, energy, occupational hygiene,…
Financial Health
WeakWeak · 1% CAGR over 4y
Location
RW Air Energy Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides energy assessment services for buildings, including TM44 air conditioning energy inspections, commercial and domestic Energy Performance Certificates, Display Energy Certificates, and ESOS…
Serves UK property owners, landlords, building managers, large organisations needing ESOS compliance, public authorities, and energy assessors requiring TM44, EPC, DEC or air-conditioning inspection…
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 2y
Location
Sollars Marine Surveys Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StableStable · Hiring · 41% CAGR over 2y
Location
HSBM PROJECTS LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and supplies hardware and software for noise and vibration measurement and analysis, including data acquisition systems, sensors and signal processing tools. Provides testing, rental and…
Sells to engineering, test and R&D teams in automotive, aerospace, defence, energy, rail, manufacturing, power generation and space sectors needing noise and vibration measurement and analysis…
Financial Health
StableStable
Location
TWC Consulting
Provides environmental and sustainability consultancy for construction projects, including BREEAM assessments, energy modelling, SBEM, SAP and EPC calculations, PAS 2035 advice, renewable energy…
Serves public and private sector clients involved in construction and property development, including project teams for offices, schools, healthcare facilities, fire stations, industrial units,…
Financial Health
Insufficient historyInsufficient history
Location
Alarm Testing Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StrongStrong
Location
Genecheck Ltd
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
DistressedDistressed · 0% CAGR over 1y
Location
TECKCHEK EUROPE LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed · -71% CAGR over 4y
Location
FANTELI LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
Perry Analytical Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides asbestos testing services including air monitoring, material analysis, and building surveys. Operates a laboratory accredited for testing and inspection, serving government bodies, property…
Serves government authorities, local councils, NHS trusts, asbestos removal organisations and property services firms across Hampshire, Sussex, Surrey, Dorset and Southern England.
Financial Health
DistressedDistressed · -9% CAGR over 5y
Location
Paint Inspection Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides coating and paint inspection services for infrastructure and industrial assets, including coating condition surveys, lead paint testing, coating failure analysis, quality control…
Serves B2B and public-sector clients, including civil asset owners, specialist contractors, manufacturers, rail and highways operators, local authorities, and oil, gas, marine and renewable energy…
Financial Health
StrongStrong · -3% CAGR over 4y
Location
ABSOLUTE CALIBRATION LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides calibration and repair services for measurement and process control instruments, including electrical, temperature, humidity and pressure equipment. Offers laboratory and onsite calibration…
Serves UK businesses and laboratories that use electrical, temperature, humidity, pressure, RF, torque and process-control instruments, including organisations needing onsite support at their…
Financial Health
WeakWeak · -68% CAGR over 4y
Location
Interscience Communications Ltd.
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides fire testing services for materials and products through a dedicated laboratory, including data analysis and project management. Also organises international conferences in fire science and…
Serves international product manufacturers needing fire testing, plus fire science and engineering researchers, consultants, industry professionals and organisations attending specialist fire-related…
Financial Health
StableStable · 0% CAGR over 5y
Location
M C Eng. Svs. Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures lifting, lashing and mooring equipment for marine and industrial use. Provides load testing, inspection, repair and refurbishment services, including LOLER examinations,…
Serves B2B marine, offshore and industrial companies using lifting, lashing, mooring and cable-working equipment, including operators needing LOLER compliance, testing certificates and on/off-site…
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
Location
Lloyds Ships Safety Services Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsSupplies and hires lifting equipment and accessories including hoists, slings, shackles and beam clamps. Provides LOLER and PUWER inspections, load testing, destructive and non-destructive testing,…
Serves UK businesses and public-sector organisations using lifting equipment, including marine, aviation, defence, waste and industrial facilities, plus site managers responsible for LOLER compliance…
Financial Health
StrongStrong · Growing, Hiring · 73% CAGR over 2y
Location
Covercraft GT Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsSupplies and hires lifting and rigging equipment including hoists, slings, shackles and clamps. Provides LOLER and PUWER inspections, destructive and non‑destructive testing, industrial door…
Serves UK businesses needing lifting, rope and safety compliance support, including industrial, marine, aviation, defence and waste-sector operators, plus organisations managing depots, workshops or…
Financial Health
DistressedDistressed · -11% CAGR over 2y
Location
SWL NDT Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsSupplies and hires lifting and rigging equipment including hoists, slings, shackles and cranes. Provides LOLER and PUWER inspections, destructive and non-destructive testing, industrial door…
Serves UK businesses needing lifting, testing and inspection support, including industrial operators, waste sector organisations, defence, marine and aviation clients, and companies managing…
Financial Health
StableStable
Location
Caltest
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsSupplies power supplies and electrical test instrumentation from third‑party manufacturers, including AC/DC power sources and bidirectional supplies. Offers equipment rental, system integration,…
Serves B2B engineering teams, electronics manufacturers, test laboratories and R&D organisations that use power sources and test instrumentation.
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 4y
Location
Envirochem Analytical Laboratories Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides environmental and occupational health testing and consultancy services. Conducts chemical and microbiological analysis, asbestos surveys and air monitoring, occupational hygiene assessments,…
Serves B2B customers across multiple sectors, including employers, property and facilities teams, construction contractors and industrial operators responsible for workplace safety, asbestos, waste,…
Financial Health
StableStable · Hiring · 7% CAGR over 4y
Location
Artisan Environmental Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides environmental and health and safety consultancy services including asbestos surveys and management, RAAC inspections, fire risk assessments, lead paint surveys, contamination testing, air…
Serves property owners, developers, architects, solicitors, block and property managers, landlords and organisations managing occupied buildings across Hampshire, London and surrounding counties.
Financial Health
WeakWeak · -3% CAGR over 4y
Location
SOUND ADVICE ACOUSTICS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides acoustic consultancy and testing services including environmental noise surveys, sound insulation and air pressure testing, reverberation measurements, and workplace noise assessments. Also…
Serves property developers, construction companies, architects and planners across the UK, supporting residential, commercial and mixed-use building projects requiring acoustic, noise and compliance…
Financial Health
WeakWeak · -4% CAGR over 4y
Location
Mech Metrology & Power Tools Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies metrology and inspection equipment including gauges, calipers, micrometers and torque tools from major manufacturers. Provides ISO9001-accredited calibration services, calibration…
Sells to businesses in manufacturing and engineering that need metrology equipment, gauges, power tools, and calibration services, including quality, inspection and maintenance teams using test and…
Financial Health
WeakWeak · -4% CAGR over 4y
Location
Wickham Micro
Provides contract microbiology testing for pharmaceutical products and medical devices. Services include sterility, bioburden, endotoxin and antimicrobial efficacy testing, method validation,…
Serves pharmaceutical and medical device companies worldwide, including manufacturers and development teams needing microbiology testing support from early-stage development through product release…
Financial Health
Insufficient historyInsufficient history
Location
Viso Group Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides fire door safety services including inspection, compliance reporting, maintenance, remedial repairs, and installation of replacement fire doors and fire exit doors. Also supplies and fits…
Serves B2B and institutional clients responsible for fire safety and compliance, including education, healthcare, hospitality, warehousing, pharmaceutical, office, heritage, MOD and facilities…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
Loadmasters Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides aircraft weight and balance services for the aerospace sector, including physical aircraft weighing, weight change calculations, load and trim documentation, training, and fleet weight and…
Serves aerospace-sector businesses and public-sector defence customers, including aircraft maintenance providers, coatings and livery refinishers, commercial and private operators, aircraft…
Financial Health
HealthyHealthy · -6% CAGR over 4y
Location
Emsworth Stability Plus Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsIndependent laboratory providing analytical testing for cosmetics, biocides, nutritional and consumer products, including stability and compatibility studies, microbiology, packaging and flashpoint…
Serves B2B manufacturers and start-ups in cosmetics, health and beauty, biocides, personal care, home fragrance, packaging and nutritional products, including firms needing UK/EU regulatory guidance.
Financial Health
StableStable · 0% CAGR over 3y
Location
Impact Geotechnical Ltd
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides geotechnical and geo-environmental ground investigations for construction and land development projects. Services include land drilling, soil and rock logging, in-situ testing, structural…
Serves UK construction, civil engineering, property development and environmental consultancy clients involved in design, planning, remediation and earthworks projects.
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
Location
AQUAFINE (UK) LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides water hygiene and treatment services for building water systems, including Legionella risk assessments, bacteriological and chemical sampling, system disinfection, and chemical treatment of…
Serves organisations responsible for managed premises, including small offices, schools, nursing homes and managers of large property portfolios across the UK.
Financial Health
StrongStrong · Hiring · 26% CAGR over 4y
Location
Forest Medical
Provides testing and calibration services for medical devices used in healthcare settings, including blood pressure monitors, spirometers, thermometers, ear syringes and vaccine fridges. Offers…
Serves healthcare organisations across the UK, including GP practices, care homes, occupational health departments and ambulance stations, typically teams responsible for medical equipment compliance…
Location
Lloyds Beal Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, manufactures and installs crane systems, lifting equipment and structural steelwork. Provides crane repair, servicing and testing, lifting gear inspection and certification, bespoke metal…
Serves B2B industrial clients in construction, manufacturing, rail, defence, marine, transportation and infrastructure, including facilities and operations teams with crane, lifting and structural…
Financial Health
StrongStrong · Growing, Hiring · 38% CAGR over 2y
Location
EGS (INTERNATIONAL) LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides marine hydrographic and geophysical surveying services, including seabed mapping, geotechnical investigations, metocean data collection, positioning and construction support, and UXO surveys…
Serves B2B clients in telecommunications, renewable energy, oil and gas, charting, ports and marine infrastructure, including energy and telecoms companies with global marine project needs.
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 2y
Location
AD Marine Services Ltd
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides marine surveying and naval architecture services for vessel owners and marine businesses. Also offers project management for vessel builds and refits, boatbuilding optimisation, and maritime…
Serves marine industry clients worldwide, including vessel owners and operators, boatbuilders, and maritime businesses needing surveying, coding, project support, business development, or vessel…
Financial Health
StableStable
Location
ST CROSS HOMES (LISS) LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDevelops and supplies noise and vibration measurement systems, including data acquisition hardware, sensors and signal analysis software. Provides testing, monitoring and engineering services for…
Sells to B2B engineering and test teams in automotive, aerospace, defence, energy, rail, manufacturing and power generation companies.
Financial Health
DistressedDistressed
Location
Engineering Safety Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides functional and engineering safety consultancy for industrial projects, including process hazard analysis, SIL classification and verification, safety lifecycle management, quantitative and…
Serves international B2B customers in process and high-hazard industries, including end users, major operators, EPC companies and system integrators needing functional safety and compliance support.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
HYDROTECH SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides legionella control and water hygiene services, including risk assessments, compliance audits, bacterial and chemical water sampling, water storage tank inspection and cleaning, thermostatic…
Sells to organisations responsible for water systems and legionella compliance, including facilities and duty holders managing commercial premises and heritage sites. Serves a B2B market focused on…
Financial Health
StableStable · -2% CAGR over 5y
Location
A D Marine Services Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides marine surveying and naval architecture services for vessel owners and marine businesses, including inspections and coding surveys, boatbuilding optimisation, project management for vessel…
Serves marine industry businesses and vessel owners needing marine surveying, project management, boatbuilding optimisation, and commercial support, including clients requiring RYA/MCA coding, vessel…
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
LIGHTNING FIRE SAFETY SYSTEMS LTD
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides installation, inspection, and maintenance of fire safety and security systems, including fire alarms, emergency lighting, fire extinguishers, smoke ventilation (AOVs), CCTV, intruder alarms,…
Serves building owners and facilities/property managers in charities, housing associations and commercial organisations, plus electrical contractors seeking a specialist fire safety and electrical…
Financial Health
StableStable · -69% CAGR over 4y
Location
SUMO Survey Services
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides land and engineering survey services including aerial drone surveys, geophysical and utility detection, topographic mapping, measured building surveys, laser scanning and 3D modelling, rail…
Serves construction, engineering, infrastructure, rail, property and heritage organisations, including developers, contractors, architects, utilities teams and public-sector bodies across the UK.
Financial Health
WeakWeak · -1% CAGR over 4y
Location
IRED LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides drone-based remote sensing and thermal imaging surveys for buildings, infrastructure, agriculture and energy assets. Supplies drones, sensors and thermal cameras, offers equipment hire,…
Serves public sector and commercial customers, including emergency services, defence, local councils, NHS, utilities, property professionals, solar farms, data centres, agriculture, and buyers of…
Financial Health
StableStable · Hiring · 19% CAGR over 2y
Location
PHASE SITE INVESTIGATIONS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides non-intrusive site investigation services including geophysical surveys, utility tracing and mapping, drainage surveys, archaeological geophysics, and land and building surveys such as…
Serves B2B clients in construction, property development, civil engineering, utilities and heritage/archaeology, including project teams needing site investigation, mapping and survey input.
Financial Health
DistressedDistressed · 0% CAGR over 2y
Location
JONATHAN WOOD ASSOCIATES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides façade engineering consultancy and building envelope services for construction projects, including façade inspections, defect and condition surveys, maintenance advice, refurbishment…
Serves construction and property-sector clients, including developers, main contractors, local authorities, architects, façade contractors, engineers and allied surveyors across the UK and…
Financial Health
WeakWeak · 0% CAGR over 2y
Location
ND Aerospace Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StableStable
Location
Neural Link Ltd
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
HealthyHealthy · 0% CAGR over 1y
Location
SUMO Survey Services
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides land and infrastructure surveying services, including topographic surveys, utility detection, measured building surveys, laser scanning and 3D surveys, aerial drone surveys, geophysical and…
Serves developers, construction and engineering firms, rail and infrastructure operators, property owners and public-sector bodies across the UK with project survey requirements.
Financial Health
WeakWeak · -2% CAGR over 4y
Location
CHP Surveyors Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
INTELIPORTS LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StrongStrong · Hiring · 116% CAGR over 2y
Location
Premlex Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical installation, repair and maintenance services for domestic, commercial and industrial properties. Services include rewiring, lighting and heating systems, electrical inspection…
Serves domestic homeowners, landlords, commercial premises, industrial sites and agricultural customers along the South Coast.
Financial Health
HealthyHealthy · Growing, Hiring · 5% CAGR over 4y
Location
LUNA TESTING LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
DistressedDistressed · -78% CAGR over 3y
Location
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How Portsmouth TIC companies work and how to sell to them
What they do
Portsmouth TIC providers usually earn revenue from repeat service lines rather than one-off product sales. Calibration, inspection and testing work is commonly priced per asset, per site visit, per sample or on an annual service schedule, while certification and management-system support tends to be scoped as audit days, assessment packages and renewal cycles. Higher-value work often combines field attendance, laboratory or workshop activity, technical review and a formal report that can sit in a customer's audit trail. Margin depends less on software-like scale and more on assessor utilisation, travel time, accreditation scope, equipment upkeep and the ability to schedule recurring work without letting response times slip.
Who they sell to
Customers are usually practical buyers with quality, engineering, operations, facilities or procurement responsibility. Small purchase orders can be approved by operations or quality managers, but larger frameworks tend to involve procurement, finance and technical sponsors. Sales cycles are shorter where a client needs routine calibration or emergency inspection, and longer where a buyer is appointing a certification partner, adding a site, or answering a public-sector tender. Most work is sold through direct relationships, referrals from engineers and consultants, subcontracting channels and formal tender portals. Decision makers care about accreditation, method coverage, turnaround, report acceptance and whether the provider can attend sites without creating avoidable downtime.
What they buy
Most TIC firms tend to spend on systems that reduce manual administration around jobs, certificates and renewals. That can include CRM, quoting, scheduling, field-service management, document control, quality management, asset registers, calibration records, laboratory workflow, invoicing, credit control and management reporting. They also buy specialist insurance, legal and compliance advice, accounting, recruitment, training, fleet support, equipment maintenance, courier or sample logistics, website and search marketing, and cyber security. Technical teams may be wary of generic tools if they create duplicate entry, so sellers usually need to show how a system preserves traceability, version control, competency records and report sign-off.
Why and how to sell to them
TIC buyers tend to evaluate suppliers when recurring work starts to outgrow spreadsheets, when an accreditation scope changes, when assessors are hard to schedule, or when tenders require better evidence of competence, insurance, service levels and audit history. Other triggers include new technical managers, branch moves, equipment investment, a lost renewal, an insurer request or a customer pushing for shorter turnaround. Outbound angles usually work better when tied to operational leakage: missed calibration dates, slow certificate production, low assessor utilisation, rekeyed job notes or weak visibility over margins by service line. Claims should be practical and evidenced, not framed as abstract productivity.
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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