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A&D Companies in Portsmouth: 81 Active Firms (2026)
Aerospace and defence companies design, manufacture and support aircraft, systems and controlled equipment in and around Portsmouth.
Buying centres tend to sit in engineering, programme delivery, quality assurance and procurement, rather than a single departmental buyer. Suppliers in this niche sell into prime-contractor supply chains, government programmes, overseas regulated buyers and civil-aviation operators, with work often won through tenders, framework-style routes or long qualification processes. Engagements are usually project-scale or programme-linked: design packages, assemblies, maintenance support, test activity, technical services and systems integration. The commercial pattern is therefore closer to regulated industrial subcontracting than to transactional component sales, with certification evidence and export classification part of the buying conversation.
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Portsmouth has 81 actively trading aerospace and defence companies in this list, a compact local cohort rather than a broad national pool. Reported headcount totals 732 people, pointing to a supplier base with visible employment but a limited number of employers at scale. The profile fits a city-region market built around engineering, maintenance, integration and controlled-component work, where buyers are likely to scrutinise quality systems, delivery history and export-control readiness before committing production or programme-critical work.
Civil aviation safety and certification sit with the CAA, while market access for civil work is affected by alignment with EASA and closer cooperation with the FAA. Defence and dual-use exports add a separate compliance track: exporters need to classify controlled goods and technology against the UK consolidated list and apply to the Export Control Joint Unit where controls, end-use concerns or sanctions apply. Exporting controlled items without the correct licence is a criminal offence. ADS provides the sector trade-body context across aerospace, defence, security and space, but the operational burden still sits with each exporter and supplier.
The local pipeline appears weighted towards SMEs, recent entrants and specialist operators rather than a deep bench of scaled manufacturers. That tends to make qualification, certification evidence and customer concentration central to the next phase of development. Civil aviation suppliers may find market access shaped by regulatory alignment, while defence-facing firms remain exposed to programme timing and export-licence scrutiny. Consolidation looks more likely around niche capability, assurance processes and access to prime-contractor routes than around broad platform plays. For researchers, the useful distinction is between production-ready suppliers and firms still selling technical capacity project by project.
81
Active firms
2026
7
Over £5M
reported turnover
19
Incorporated since 2022
newer registrations
Key facts
About 8% of the trading cohort reports turnover above £5M (7 of 81 firms) — the rest sits below that revenue band.
23% of the cohort was incorporated since 2022 (19 firms), so a sizeable share is in its first few filing cycles.
Civil aerospace suppliers operate under CAA safety and certification oversight, with certification alignment affecting access to overseas markets.
Defence and dual-use exporters face licensing duties under the Export Control Act 2002 and Export Control Order 2008 where controlled items, sanctions or end-use concerns apply.
ADS puts UK aerospace turnover at £30.5 billion in 2024, alongside £20 billion of exports.
GOV.UK reports UK defence orders of £13.2 billion in 2024, up from £11.9 billion in 2023.
Aerospace products accounted for 53% of UK defence export orders over 2020–2024, making aerospace the largest product category in that period.
Top Portsmouth A&D companies
Lefay Engineering Limited
Trajectory
4y · 2022–NowDesigns and manufactures precision fuel system components for light aircraft, including fuel pumps, filters, selectors, gascolators, check valves, locking fuel caps and throttle quadrants. Supplies…
Serves amateur aircraft builders, kit-plane manufacturers, and sport/general aviation owners/operators needing components for amateur-built and certified light aircraft, with some commercial aviation…
Financial Health
Insufficient historyInsufficient history
Location
PHASE ONE HOLDINGS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and manufactures high‑resolution digital cameras and imaging systems for aerial mapping, geospatial surveying, cultural heritage digitisation, space missions, industrial inspection, and…
Sells to geospatial mapping and surveying firms, UAV inspection and security operators, space mission teams, cultural heritage digitisation institutions, and professional landscape or studio…
Financial Health
StableStable · 0% CAGR over 4y
Location
GKN Aerospace
Manufactures and supplies aerospace components and systems, including airframe and engine structures, landing gear, electrical wiring interconnection systems, and transparencies, and provides…
Serves aircraft and engine manufacturers, defence aerospace programmes, and aviation aftermarket/MRO customers across commercial aircraft, helicopters, business jets, advanced air mobility vehicles…
Location
SIRIUS DIGITAL SERVICES LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides software engineering services including modelling and simulation, optimisation algorithms, and development of synthetic training environments. Works on robotics and autonomous systems…
Serves UK defence organisations and adjacent technical sectors, including teams working on autonomous systems, synthetic training environments, land and maritime simulation, and offshore wind farm…
Financial Health
StrongStrong · Hiring · 29% CAGR over 1y
Location
Scott Cables Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns and manufactures electrical and RF cable assemblies and wiring harnesses. Distributes RF cables, connectors and related components, and provides subcontract assembly, kitting and design…
Serves B2B and public-sector customers needing cable interconnects, including aerospace, automotive, defence, energy, industrial, marine, medical, rail, telecoms and broadcast, unmanned vehicle and…
Financial Health
HealthyHealthy · Hiring · 10% CAGR over 3y
Location
Metaverse VR Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDevelops virtual, augmented and mixed reality software and simulations for training and operational preparation. Builds immersive 3D environments and modelling systems for sectors including defence,…
Serves defence, aerospace, maritime, land operations and emergency response organisations, including public-sector and private-sector teams needing immersive training and simulation environments.
Financial Health
StrongStrong · Growing, Hiring · 246% 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
DavidLHolmes Contracting Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
Bodyworks Carbon Fibre Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · 0% CAGR over 4y
Location
Dynautics Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures control systems for unmanned marine vehicles, including autopilots, remote control, navigation, communication and power management systems for uncrewed surface vessels and…
Serves B2B and public-sector organisations developing or operating uncrewed surface and subsea vehicles, including offshore energy and mining firms, oceanography teams, marine transport operators,…
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
Portsmouth Aviation
Provides precision engineering and manufacturing services including CNC machining, metal fabrication and welding, metal and paint finishing, and component qualification, inspection and testing,…
Serves B2B customers in precision engineering sectors, particularly project teams and manufacturers needing bespoke engineering support, production capabilities, and qualification or testing input.
Location
Owen Aviation Ltd
Trajectory
1y · 2024–NowFinancial Health
Insufficient historyInsufficient history
Location
Wilkinson2Group Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
HealthyHealthy · 0% CAGR over 2y
Location
Carrad Engineering Ltd
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
WeakWeak · 0% CAGR over 1y
Location
Prime Engineering Solutions Ltd
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
WeakWeak · 0% CAGR over 1y
Location
No Fuss Engineering Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
WeakWeak · Hiring · 41% CAGR over 2y
Location
J M Automatics Limited
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsProvides precision CNC milling and turning services, producing machined components for sectors including aerospace, medical, military, marine and motorsport. Offers finishing, assembly and design…
Serves B2B customers in aerospace, medical, military, marine, motorsport and commercial sectors, including buyers needing bespoke one-off components or large-volume production runs.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 3y
Location
Portsmouth Aviation
Provides precision engineering and manufacturing services including CNC machining, metal fabrication, metal finishing, paint and protective coatings, and qualification, inspection and testing. Also…
Serves B2B customers in precision engineering industries, particularly organisations managing projects that require bespoke manufactured components and in-house engineering support.
Location
SIRIUS ANALYSIS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides technical and management consultancy services including operational analysis, cost engineering, systems engineering, programme and project management (P3M), and business case development.…
Serves UK public-sector bodies and large organisations in defence, energy and sustainability, nuclear, space and transport, including government programme teams making major investment and…
Financial Health
StrongStrong · Hiring · 108% CAGR over 4y
Location
APL ENGINEERING LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · -13% CAGR over 5y
Location
R&S Tech Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
AHA ENGINEERING LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
WeakWeak · 0% CAGR over 3y
Location
Bravo November Limited
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
HealthyHealthy · 0% CAGR over 1y
Location
Duchy Sky Limited
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
Precision Metal Polishing Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides precision metal finishing services including polishing, deburring, blasting and barrelling of engineered components. Uses processes such as vapour blasting, vibro polishing and super…
Serves B2B customers in aerospace, nuclear, power generation, automotive, industrial, construction and commercial sectors, particularly organisations working with precision metal components.
Financial Health
StrongStrong
Location
Southdown Aero Services Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides aircraft component manufacturing, maintenance and repair services for the aerospace sector, with CAA/EASA Part 145 maintenance and Part 21G production approvals, plus aircraft-on-ground…
Serves B2B customers in the aerospace sector, including aircraft operators, airlines, maintenance organisations and manufacturers needing certified UK CAA/EASA/EN9100 suppliers.
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
STS Defence
Designs, manufactures and integrates mission‑critical communications, electronic warfare and instrumentation systems for defence platforms. Provides communications masts, satellite communications…
Serves public-sector defence bodies and prime contractors in naval and air defence, alongside aerospace, marine and nuclear organisations such as Royal Navy, Submarine Delivery Agency and Typhoon…
Location
TELEPLAN UK LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDesigns and supplies positioning, navigation and timing (PNT) technologies, including GNSS/GPS receivers, antennas, anti‑jam systems, inertial navigation units, simulators and networking solutions.…
Serves B2B and public-sector customers in aerospace, defence, automotive, agriculture, logistics, marine, mining, construction, security, space, surveying, timing/synchronisation and transport with…
Financial Health
DistressedDistressed
Location
L.F.D. Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures LED lighting systems for military and commercial aircraft and ground vehicles, including anti‑collision, position, formation, landing and infrared lights. Provides optical…
Serves B2B defence and aerospace customers, especially military fixed-wing and rotary aircraft operators, avionics integrators and ground vehicle programmes, plus external customers needing…
Financial Health
HealthyHealthy · Growing · 2% CAGR over 4y
Location
PROPTECH AERO LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides maintenance, repair and overhaul (MRO) services for aircraft propellers, including OEM‑approved repairs, overhauls, dynamic balancing and field service. Supplies new propellers, spare parts,…
Serves aircraft owners, general aviation operators, airlines, special mission aviation providers and military customers, with a stated global customer base.
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 2y
Location
FORCE DEVELOPMENT SERVICES LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures mission‑critical equipment and engineering solutions for defence, police and security sectors, including ballistic protection, tactical ladders, vehicle-borne intervention…
Serves government defence agencies, police and law enforcement bodies, armed forces, security organisations, humanitarian organisations, and strategic partners globally.
Financial Health
HealthyHealthy · -63% CAGR over 4y
Location
Percival Aviation Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures, certifies and maintains aircraft interior components and equipment for commercial and specialist aircraft. Products include cabin fittings, lavatory and door components, seat…
Serves airlines, aircraft operators and aviation organisations needing certified aircraft interior components and cabin refurbishment support, including commercial aircraft and specialist helicopter…
Financial Health
StableStable · 2% CAGR over 4y
Location
Exail Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops navigation, robotics and autonomous systems for defense, maritime and aerospace applications, including inertial navigation systems, mine countermeasure equipment, unmanned surface and…
Serves public-sector defence organisations, including navies and armies, plus maritime, offshore energy, oil and gas, construction, seabed survey, ocean science and aerospace manufacturers and…
Financial Health
StrongStrong · Growing, Hiring · 13% CAGR over 2y
Location
REHEAT AERO LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides maintenance, repair and overhaul (MRO) services for aircraft galley and cabin interior equipment, including ovens, coffee makers, water heaters and cockpit door components. Also supplies…
Serves B2B aviation customers, including airlines, aircraft OEMs and MRO partners worldwide, with emphasis on operators and maintenance organisations handling aircraft galley, cabin, lavatory and…
Financial Health
StrongStrong · Hiring · 18% CAGR over 3y
Location
Southbourne Rubber Company Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures precision rubber and elastomer sealing components including O‑rings, grommets, extrusions and custom moulded parts. Provides rubber-to-metal bonding, materials development and…
Serves B2B and public-sector customers in aerospace, defence, medical, marine, energy and engineering, including commercial and military aerospace platforms, MOD/DoD supply chains and specialist…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
PMLL Asset Management Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides aerospace weight and balance services including aircraft and component weighing, weight change calculations, load and trim documentation, fleet weight and balance management, training, and…
Serves aerospace-sector organisations, including aircraft maintenance providers, coatings and livery refinishers, commercial and private aircraft operators, aircraft manufacturers, and UK MOD defence…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
BARNBROOK SYSTEMS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures and distributes motion control and electro‑mechanical switching equipment, including relays, solenoids, power controllers, circuit breakers and pressure transducers, supplying components…
Serves B2B customers in aerospace, defence, security and space, including OEM supply chains and engine control repair organisations requiring certified electro-mechanical components.
Financial Health
HealthyHealthy · Hiring · 18% CAGR over 2y
Location
ARCHOAK AVIATION LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · 0% CAGR over 4y
Location
LENA Space Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · 0% CAGR over 4y
Location
THORN SDS LIMITED
Trajectory
1y · 2025–NowProvides managed IT services, secure platform engineering and technical support for space, defence and security projects. Supplies security‑cleared engineers and specialists for spacecraft…
Serves public-sector and prime-contractor clients in the space, defence and security sectors, including UK MoD, defence primes, ESA, EUMETSAT and European space prime partners.
Financial Health
Insufficient historyInsufficient history
Location
CHK-Aero Limited
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
A. C. W. Engineering Services Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision engineering and machining services including component manufacture, assembly, inspection, and hydraulic and pneumatic testing. Produces batch and prototype parts and equipment such…
Serves B2B clients in defence, nuclear, aerospace, explosion suppression, fire detection and yacht racing, from small local projects in Hampshire to major national work and international customers.
Financial Health
StrongStrong · Hiring · 4% CAGR over 4y
Location
LIGHTFOOT DEFENCE LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures, installs and services refrigeration and air‑conditioning systems for aerospace, maritime and land applications. Also supplies spares, refrigerant reclamation services, and…
Serves B2B and public-sector buyers in defence, aerospace, maritime, land and offshore sectors, including UK and international prime contractors, commercial organisations, governmental defence…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
DIEM Analytics Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops analytical models, simulations and decision-support tools to support defence and security planning. Provides research, analysis and experimentation during capability concept and assessment…
Serves defence and security organisations, including government defence stakeholders from tactical to strategic levels, defence primes, and research organisations involved in capability development…
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 4y
Location
BOURNEMOUTH AVIONICS LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides aircraft avionics installation, repair and maintenance services alongside aircraft engineering support. Sells avionics equipment, instruments, radios, transponders, pilot supplies and…
Serves private and commercial aircraft owners, pilots, aircraft operators and aviation maintenance buyers in general aviation seeking avionics, pilot supplies, aircraft parts, repairs and…
Financial Health
DistressedDistressed · -6% CAGR over 4y
Location
WARTSILA DEFENCE SOLUTIONS LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and supplies engineered shaft line components and integrated shaftline systems for naval and cruise vessels. Provides equipment and technical support for new ship construction as well as…
Serves B2B and public-sector marine customers, particularly naval defence organisations, shipyards, cruise lines and vessel operators involved in newbuild and in-service vessel programmes.
Financial Health
StableStable · 0% CAGR over 2y
Location
INTELIPORTS LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StrongStrong · Hiring · 116% CAGR over 2y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides secure digital technology services for defence organisations, including software development, data platforms, systems integration and cybersecurity solutions supporting defence and national…
Serves public-sector defence bodies and defence-industry organisations, including military, government and contractor teams that buy secure digital services.
Financial Health
StrongStrong · Growing, Hiring · 69% CAGR over 4y
Location
PROPONENT U.K. LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDistributes aircraft parts and components for commercial and business aviation, including airframe, engine, electrical and interior products. Provides supply chain services such as AOG support,…
Sells to B2B aviation customers and suppliers, including airlines, MRO providers, OEMs and other aircraft parts buyers needing airframe, engine, flight deck, cargo and interior components, with an…
Financial Health
StableStable · -71% CAGR over 4y
Location
AEGINA TECHNOLOGIES LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides subcontract precision engineering services manufacturing machined components and assemblies using CAD/CAM, CNC milling and CNC turning. Also offers assembly and finishing processes for…
Serves B2B customers in engineering supply chains, especially aerospace, oil and gas, and underwater sectors, that require subcontract-manufactured components and assemblies.
Financial Health
HealthyHealthy · -79% CAGR over 3y
Location
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How Portsmouth A&D companies work and how to sell to them
What they do
Revenue usually comes from programme-linked engineering work rather than high-volume catalogue sales. Portsmouth A&D firms may charge through fixed-price work packages, milestone payments, time-and-materials technical services, recurring maintenance support or production orders tied to a qualified assembly. Gross margin depends on utilisation, rework, certification cost and whether the firm owns repeatable IP or mainly sells engineering capacity. Pricing is rarely self-serve; quotations tend to bundle labour, specialist tooling, materials, test evidence, documentation and delivery risk into a contract-specific proposal.
Who they sell to
Typical customers are prime-contractor supply chains, government programme teams, regulated industrial buyers and civil-aviation operators. The named budget holder is often less important than the buying committee: engineering wants performance evidence, quality assurance wants traceability, programme delivery wants schedule confidence, and procurement wants acceptable commercial risk. SMEs in this segment usually win through direct sales, approved-supplier routes, partner referrals or formal tenders, with sales cycles that can run for months where qualification, security review or export classification is material. Buyers value proof of delivery under comparable constraints more than generic capability claims.
What they buy
Most A&D firms tend to spend on systems and services that help them pass audits, deliver repeatable work and protect controlled technical information. Relevant pitches often sit around quality management, document control, requirements management, configuration control, ERP or MRP, project controls, secure collaboration, cyber security, export-control screening, supplier onboarding and calibration management. Non-software spend can be just as relevant: specialist recruitment, bid writing, technical documentation, insurance, legal advice, accounting for project revenue, health and safety support, facilities, test equipment and metrology services. The clearer fit is usually tied to compliance evidence or delivery performance, not generic back-office efficiency.
Why and how to sell to them
A&D buyers tend to evaluate vendors when a contract award stretches existing processes, a prototype moves towards production, an audit exposes document-control gaps, or a bid requires evidence the firm cannot produce manually. Other triggers include leadership change, new quality hires, headcount growth, overseas sales activity and preparation for CAA-facing or export-controlled work. Outbound messages should be specific to the operating constraint: fewer non-conformances, faster bid evidence, clearer supplier traceability, lower rework, tighter protection for controlled drawings, or less engineering time spent chasing paperwork. Credibility matters; inflated claims are usually easy for technical buyers to dismiss.
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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