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Aerospace & Defence Companies in Leeds: 47 Active Firms (2026)
Aerospace and defence companies design, supply or support aircraft, security and controlled dual-use systems around Leeds.
Procurement and engineering teams, rather than general IT buyers, shape most purchasing in this market. Leeds-area suppliers tend to sell to civil aviation operators, defence contractors, security customers and regulated manufacturers that need traceable components, maintenance support, specialist machining or systems-integration capability. Engagements are usually project or framework based, with qualification, safety documentation and export-control screening built into the sales cycle. The commercial pattern is closer to technical supply-chain contracting than subscription software: fewer high-volume transactions, more repeat work with approved customers, and purchasing decisions that often involve operations, quality, finance and compliance together.
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Leeds has 47 actively trading aerospace and defence companies in this list, giving the city a relatively concentrated cohort rather than a broad national hub. Reported employment across these companies totals 757 people, so the footprint is visible but still weighted towards specialist suppliers and services businesses. Turnover distribution points the same way: 11 firms report more than £5M of UK turnover, while the remainder sit below that threshold. The local market therefore looks more like a cluster of engineering, maintenance and controlled-supply businesses than a set of large platform manufacturers.
Civil aviation work around Leeds sits under CAA safety and certification oversight, with market access also shaped by alignment with EASA and closer cooperation with the FAA. Defence and dual-use supply brings a separate compliance route. gov.uk guidance requires exporters to check the consolidated list and seek Export Control Joint Unit licences where items are controlled, end-use concerns arise or sanctions apply. The Export Control Act and Export Control Order provide the legal basis, and exporting controlled items without the correct licence is a criminal offence. ADS also matters as the trade association spanning aerospace, defence, security and space.
Supply-chain and technical-services specialists appear likely to remain the centre of gravity. The cohort tends to favour approved-supplier relationships, certification know-how and repeat maintenance or component work, rather than speculative product launches. That can make growth lumpy: an individual defence programme, aviation customer or export-control decision can alter workload more than broad demand trends. Scarcity of larger firms may also keep consolidation on the table, especially where buyers want certified capacity, quality assurance and established customer access. Companies able to straddle civil aviation and controlled dual-use work should have options, but compliance costs will remain a brake on very early commercial teams.
47
Active firms
2026
11
£5M+ firms
Revenue threshold
5
Recent incorporations
Since 2022
Key facts
About 23% of the trading cohort reports turnover above £5M (11 of 47 firms) — the rest sits below that revenue band.
10% of the cohort was incorporated since 2022 (5 firms), so a sizeable share is in its first few filing cycles.
The CAA oversees civil aviation safety and certification, while ADS notes that EASA alignment and closer FAA cooperation matter for market access.
Defence and dual-use exporters must check the consolidated list and seek Export Control Joint Unit licences where controlled items, end-use concerns or sanctions apply.
UK defence orders reached £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.
The UK aerospace industry is export-driven, with 70% of domestic aerospace production exported in 2023.
Top Leeds aerospace & defence companies
JETGLOW AIRCRAFT REFURBISHMENTS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides aircraft maintenance and repair services under UK CAA Part 145 approval. Manufactures aircraft decals and components under Part 21G, and offers line station support, storage, refurbishment…
Serves B2B aviation customers, including airlines, aircraft operators and industry partners managing commercial aircraft fleets under UK CAA Part 145 and Part 21G requirements.
Financial Health
StrongStrong · Hiring · 14% CAGR over 4y
Location
Aeroservices
Provides aviation technical inventory management, supplying aircraft spare parts, components, lubricants, chemicals, tyres and tooling. Offers maintenance and repair for engines, APUs and landing…
Sells to aviation businesses globally, including airlines, MROs, CAMO operators, lessors and other aircraft operators needing technical inventory, component supply, maintenance, leasing and overhaul…
Location
Saras Technology Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures RF and microwave amplifiers, filters and subsystems operating up to 40 GHz. Produces linear and pulsed power amplifiers and cavity, ceramic and printed filters, including…
Serves B2B customers including major OEMs and defence, aerospace, telecoms, surveillance/security and broadcast organisations worldwide.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
3D PLUS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures radiation‑tolerant microelectronic components and system‑in‑package modules for space and aerospace applications, including memory devices, interfaces, power management…
Serves B2B customers in the global space, aerospace, defense, security and avionics sectors, including satellite manufacturers, mission operators and government space/defense programmes.
Financial Health
HealthyHealthy · -16% CAGR over 4y
Location
TANGLEWOOD COMMERCIAL DEVELOPMENTS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides engineering and logistics support services for defence and commercial sectors, including integrated logistics support and through‑life sustainment management. Offers bid and tender…
Serves B2B customers in defence and commercial sectors, including defence contractors, technology product suppliers, businesses pursuing defence contracts, and organisations needing specialist…
Financial Health
StrongStrong
Location
Multiflight Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides general aviation services including private jet and helicopter charter, aircraft engineering and maintenance, avionics, aircraft parts sales, aircraft sales and management, air ambulance…
Serves a mix of private individuals, businesses, organisations, aircraft owners and operators, executive aircraft passengers and crew, plus buyers and sellers in the general aviation market.
Financial Health
StableStable · -59% CAGR over 5y
Location
Doncasters
Manufactures precision alloy components and vacuum‑ and air‑melted superalloys using casting and forging processes. Supplies turbine airfoils, combustion parts, structural components, heat shields,…
Sells to large OEMs and manufacturers in aerospace and defence, industrial gas turbines and mobility/automotive, with additional customers in medical and other specialist industries.
Location
Doncasters
Manufactures precision cast and forged metal components and vacuum‑ or air‑melted superalloys for aerospace, industrial gas turbines and automotive applications, including turbine airfoils,…
Serves global B2B OEMs and manufacturers in aerospace and defence, industrial gas turbines, mobility, medical and other specialist high-performance engineering markets.
Location
Doncasters
Trajectory
1y · 2021–NowManufactures superalloys and precision alloy components, including castings and forgings, for aerospace, industrial gas turbine and mobility sectors. Produces turbine airfoils, combustion components,…
Serves B2B OEMs and manufacturers in aerospace and defence, industrial gas turbines, mobility/automotive, medical and other specialist industries requiring high-performance alloy components and…
Financial Health
Insufficient historyInsufficient history
Location
FREEUA LIMITED
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides helicopter maintenance, repair and overhaul services, specialising in Robinson R22 and R44 aircraft. Offers airworthiness services, pre‑purchase inspections, and sales of helicopter spare…
Serves private helicopter owners and commercial helicopter operators, especially Robinson R22/R44 users, plus buyers of pre-owned Robinson aircraft and operators needing parts or airworthiness…
Financial Health
StrongStrong · Growing, Hiring · 50% CAGR over 4y
Location
Doncasters
Manufactures superalloys and high‑precision alloy components using casting, forging and vacuum‑melting processes. Supplies turbine airfoils, combustion parts, structural components, turbocharger…
Serves B2B customers, primarily leading OEMs in aerospace and defence, industrial gas turbines and mobility, with additional customers in medical and other specialist high-performance industries.
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsRetailer of commercial drones, payloads, sensors and related software, primarily from manufacturers such as DJI. Also provides drone pilot training courses, consultancy, equipment servicing and…
Serves UK organisations using drones, including asset inspection, surveying and construction, public safety, agriculture, research, energy, oil and gas, security, film/media, marine operators and…
Financial Health
WeakWeak · -45% CAGR over 3y
Location
C.P.L PRECISION ENGINEERING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides CNC precision engineering and subcontract machining services, offering design input, prototyping and high‑volume production of finished components. Supplies machined parts for sectors…
Serves B2B OEMs and manufacturers needing precision-engineered components, particularly in defence, space, telecommunications, audio, autosport and safety-related railway products.
Financial Health
HealthyHealthy · Hiring · 17% CAGR over 4y
Location
G B PRECISION LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides precision engineering and CNC machining services including grinding, wire and die-sink EDM, high-speed machining, milling and turning, producing complex components and sub-assemblies for…
Sells to businesses needing complex precision components and sub-assemblies, particularly in aerospace, motorsport, packaging, defence and specialist manufacturing, including other machining…
Financial Health
WeakWeak · 0% CAGR over 3y
Location
Oilgear Towler Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures hydraulic piston pumps, valves and rotary actuators for industrial, mobile, oil and gas, energy and defence applications. Also provides electrical controls, subsea equipment, test…
Serves B2B customers in heavy industrial and mobile equipment markets, including steel, oil and gas, subsea/offshore, construction, agriculture, mining, municipalities, aerospace, defense, energy and…
Financial Health
StableStable · Hiring · 23% CAGR over 2y
Location
Doncasters Chard
Manufactures precision investment castings in nickel and cobalt alloys, including turbine airfoils, structural castings, and hot gas path components. Provides design collaboration, prototyping,…
Serves aerospace, industrial gas turbine and engineering-sector businesses worldwide, including OEMs and manufacturers needing high-specification components for engines, turbines and hot gas path…
Location
Doncasters
Manufactures vacuum‑melted and air‑melted nickel and cobalt superalloys, producing alloy ingots and remelt stock used in aerospace, gas turbine, and other high‑temperature industrial components and…
Serves B2B OEMs and industrial customers in aerospace and defence, industrial gas turbines, mobility, medical and other specialist industries requiring high-performance alloy components.
Location
Hussey Aviation Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
MI CHLORINE LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · 0% CAGR over 5y
Location
NARLA ENGINEERING & IMPORTS LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides metal finishing services for aerospace and power generation components, including chemical processing, grain and macrographic etching, chemical milling, nickel plating, and precision hand…
Serves B2B customers in the aerospace and power generation industries, including buyers needing metal finishing support for high-volume production, rapid-response work, one-off jobs, short runs, and…
Financial Health
WeakWeak · -4% CAGR over 4y
Location
Doncasters
Manufactures precision alloy components and specialist superalloys using casting, forging and vacuum‑melting processes. Supplies parts such as turbine airfoils, combustion components, heat shields…
Serves B2B customers, especially leading OEMs in aerospace and defence, industrial gas turbines, mobility and automotive, plus medical and other specialist industries requiring high-performance alloy…
Location
Doncasters
Manufactures precision cast and forged alloy components and produces vacuum‑ and air‑melted superalloys for aerospace, industrial gas turbine and mobility applications, including turbine airfoils,…
Serves B2B manufacturers and OEMs in aerospace and defence, industrial gas turbines, mobility and medical sectors, including buyers needing high-performance alloy components and superalloys for…
Location
Doncasters
Manufactures precision alloy components and superalloys, including investment castings, forged parts and turbine airfoils for aerospace, industrial gas turbines and automotive turbocharger systems,…
Serves global OEMs and industrial buyers in aerospace and defence, industrial gas turbine and mobility markets, with additional customers in medical and other specialist industries.
Location
Doncasters
Manufactures precision alloy castings and superalloy components for aerospace, industrial gas turbines and automotive applications, including turbine airfoils, engine structural parts, combustion…
Serves global OEMs and industrial manufacturers in aerospace and defence, industrial gas turbines, mobility, medical and other specialist sectors requiring high-performance alloy components and…
Location
Oilgear
Manufactures hydraulic piston pumps, industrial valves, and rotary actuators for applications in industrial machinery, oil and gas, mobile equipment, aerospace, defense, and energy sectors. Also…
Serves B2B and public-sector buyers in industrial manufacturing, oil and gas, mobile equipment, aerospace and defense, energy, automotive testing, mining, forestry, agriculture, construction and…
Location
KVH MEDIA GROUP LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies satellite communication and connectivity systems for maritime, land mobile, and government use. Offers VSAT and hybrid satellite‑cellular terminals, network management…
Serves B2B, B2C and public-sector customers, including commercial maritime operators, yacht and leisure boat owners, military and government users, and commercial vehicle or land-mobile fleets…
Financial Health
HealthyHealthy · -5% CAGR over 4y
Location
B1 AVIATION LTD
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
ARVILLE TEXTILES LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsManufactures technical textile fabrics and products, providing design, weaving, finishing, coating and fabrication services. Produces specialised materials such as protective fabrics, filtration…
Serves B2B customers worldwide, including large multinationals and specialist companies in defence, aerospace, automotive, pharmaceutical, food, medical, industrial manufacturing and filtration…
Financial Health
StableStable · -62% CAGR over 5y
Location
SPARTAN DEFENCE LTD
Trajectory
1y · 2025–NowFinancial Health
Insufficient historyInsufficient history
Location
Lemonwood Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
SW Projects Consulting Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
SAFEGUARD ARMOUR LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and sells ballistic body armour and protective equipment, including bulletproof vests, plate carriers, ballistic plates and helmets. Products are supplied for military, police, security and…
Serves military units, police and SWAT teams, security professionals, special forces, journalists and civilian buyers seeking ballistic protection, with worldwide consumer and organisational sales.
Financial Health
StableStable · 0% CAGR over 4y
Location
GFGP LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision engineering and manufacturing services for aerospace and other sectors, including design support, CNC machining, special processing, surface coatings, heat treatment, inspection,…
Serves B2B customers in aerospace, defence and adjacent high-spec engineering sectors, including OEMs and tier-one suppliers needing precision-manufactured components and bespoke contract support.
Financial Health
WeakWeak · -68% CAGR over 4y
Location
CALDER GROUP (DEWSBURY) LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsEngineers and manufactures lead and bronze metal products and precision‑engineered components. Supplies specialised materials and complex parts for industries including aerospace, defence,…
Sells to B2B and industrial customers globally, particularly organisations in aerospace and defence, construction, healthcare, marine, nuclear, oil and gas, and security that need engineered metals…
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 3y
Location
Akhter-Clogworks Technologies Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns and manufactures unmanned aerial vehicles (UAVs) under the Dark Matter brand, including heavy‑lift multirotor drones. Provides payload integration, tethered systems, and training for…
Serves professional UAV operators and organisations in defence, security, surveying and inspection, search and rescue, humanitarian operations and drone delivery, including commercial and…
Financial Health
StrongStrong · Growing · 0% CAGR over 3y
Location
Von Roll UK Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and manufactures fibre‑reinforced composite materials and components, including prepregs, composite sheets and wound tubes. Provides thermoset composite machining, resin formulation,…
Serves B2B manufacturers and engineering teams in electrical, medical technology, machinery, aerospace, paper, defence, thermal insulation and electronics sectors, from one-off parts to large-series…
Financial Health
StableStable · Hiring · 6% CAGR over 2y
Location
MICHAEL WRIGHT & SON LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures technical narrow fabrics including webbings, tapes and elastics, and develops engineered textile structures and 3D woven composite reinforcements. Provides dyeing, finishing, testing and…
Serves B2B clients worldwide in defence, aerospace, aviation, fire safety, fall arrest, healthcare, sports, leisure and industrial sectors, including manufacturers and technical product developers.
Financial Health
HealthyHealthy · Hiring · 13% CAGR over 2y
Location
Aero Maintenance Limited
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsProvides maintenance, overhaul, and technical support for private and commercial helicopters. Offers aircraft servicing, inspections, fuel supply, and hangarage, and supports helicopter owners and…
Serves private helicopter owners and commercial helicopter operators, including aircraft owners and businesses operating helicopters, with clients in the UK and across Europe.
Financial Health
StableStable · 0% CAGR over 5y
Location
UK SIMULATORS LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsSupplies flight simulation hardware and systems including professional flight simulators, cockpit consoles, flight controls, avionics panels, motion platforms and visual display setups. Also provides…
Serves flight training organisations, aviation schools, universities, colleges, schools, cadet and STEM education units, military aviation users, and serious home flight-simulation enthusiasts…
Financial Health
HealthyHealthy · Hiring · 67% CAGR over 2y
Location
North Fire Engineering Limited
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsDesigns and manufactures military light mobility vehicles (LMVs) and armoured utility vehicles for defence organisations. Develops mission vehicles with integrated technology and engineering for…
Serves NATO member-state military organisations, defence procurement teams, and military supply-chain buyers seeking specialist suppliers for battlefield mobility requirements.
Financial Health
StableStable · -25% CAGR over 3y
Location
Holtex Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides precision machining and CNC manufacturing services, including milling, turning, 5‑axis machining, rapid prototyping, batch production, and additive manufacturing for components used in…
Serves B2B customers in automotive, aerospace, defence and energy, including engineering, manufacturing and procurement teams sourcing precision-machined parts, prototypes and batch components.
Financial Health
StableStable · -5% CAGR over 2y
Location
Rathera Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electronic engineering and product development services including analogue and digital circuit design, embedded microcontroller and SoC development, RF and microwave design, test automation,…
Serves businesses and organisations in commercial, industrial, scientific, security and defence markets, particularly teams developing electronics-based products from concept to production.
Financial Health
StrongStrong · Hiring · 26% CAGR over 4y
Location
VACFORM COMPOSITES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies reusable silicone rubber vacuum bags, pressure bags and vacuum bagging systems for composite manufacturing. Also provides vacuum bench presses, heater mats, membranes, pumps and fittings…
Serves B2B manufacturers in the composites industry, especially aerospace, automotive, carbon fibre, metal-bonded component, woodworking, timber veneer and solid surface product manufacturers.
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 4y
Location
ENVIRONMENTAL DEFENCE SYSTEMS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and supplies specialist safety and protection products including FloodSax sandless sandbags for flood control and spill absorption, AvSax lithium‑battery fire containment bags for aircraft,…
Sells to B2B, public sector and consumer buyers, including airlines, armed forces, emergency responders, facilities teams and property owners needing flood, spill, battery-fire or blast protection.
Financial Health
StableStable · -66% CAGR over 4y
Location
DB Control Systems Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures RF and microwave equipment including travelling wave tube amplifiers, microwave power modules, power supplies, synthesizers, receivers, switches, and integrated microwave…
Serves the US military and major defence contractors worldwide, including buyers involved in ground mobile, maritime and airborne defence and commercial platforms.
Financial Health
HealthyHealthy · Hiring · 10% CAGR over 4y
Location
REID AVIATION SOLUTIONS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides consultancy and analytical services to the airport, airspace and air traffic management sectors, including operational concept development, airport master planning, airspace and procedure…
Serves B2B clients in the airport, airspace and air traffic management sectors, including airport operators, aviation investors and organisations involved in capacity, safety and operational planning.
Financial Health
WeakWeak · -29% CAGR over 2y
Location
FIELDING & PLATT INTERNATIONAL LIMITED
Trajectory
5y · 2023–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures bespoke industrial machinery and equipment, including metalforming presses, autoclaves, material handling systems, and clay and concrete processing machinery. Also provides…
Serves B2B industrial manufacturers and operators in metalforming, material handling, clay and concrete production, waste/recycling, aerospace, automotive, nuclear, oil and gas, mining, rail and…
Financial Health
StableStable
Location
N & G Mast Hire Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures and supplies telescopic masts, mounting systems and related accessories for communications, CCTV, lighting, photography and surveillance applications. Provides custom mast systems,…
Serves UK and international commercial, government and defence buyers, including emergency services, security/CCTV operators, communications users, sports analysis teams, photographers, filmmakers…
Financial Health
HealthyHealthy
Location
ANGLOCO LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures firefighting and rescue vehicles including aerial appliances, airport tenders, tankers and fire boats. Supplies hydraulic rescue tools, pumps, thermal imaging and other fire…
Serves public-sector and commercial emergency-response buyers worldwide, including fire and rescue services, airports, petrochemical and industrial operators, municipal authorities, defence…
Financial Health
HealthyHealthy · Hiring · 10% CAGR over 2y
Location
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How Leeds aerospace & defence companies work and how to sell to them
What they do
Revenue usually comes from engineered supply, maintenance support, inspection work, low-volume manufacturing and systems-integration projects. Pricing tends to combine unit rates for components, labour-day rates for technical services, non-recurring engineering charges, tooling costs and milestone payments linked to acceptance. Some suppliers earn repeat revenue through approved-supplier call-offs or spares work, but the commercial model is rarely subscription led. Margin depends on qualification status, material availability, documentation burden and the ability to price design changes before they become unpaid engineering effort.
Who they sell to
Customers are typically prime contractors, tier suppliers, aircraft operators, maintenance organisations, regulated manufacturers and defence or security buyers. The buying group usually includes procurement, engineering, programme management, quality, finance and compliance, with senior sign-off where export controls, safety certification or customer qualification are involved. Sales cycles tend to run in months rather than weeks, particularly when a new supplier must pass audits or technical assessment. Routes to market are often direct, through approved-vendor lists, framework agreements, formal tenders or partner-led bids into larger programmes.
What they buy
Leeds aerospace and defence firms tend to spend on systems that keep engineering, production and compliance traceable. Common categories include quality management, document control, ERP and MRP, CAD and CAM, product lifecycle management, inventory tracking, calibration management, non-conformance reporting, cyber security, CRM and bid management. Services spend often sits around export-control advice, CAA-related compliance support, insurance, accountancy, technical marketing, recruitment and training for machinists, inspectors, project managers and quality roles. Physical spend can include test equipment, workshop tooling, metrology, secure storage and subcontract manufacturing capacity.
Why and how to sell to them
Buying interest tends to appear when firms win a new framework, add an aviation or defence customer, prepare for an audit, expand workshop capacity, recruit a quality lead or begin exporting controlled goods. Pain points are practical: long qualification cycles, customer documentation, cash tied up in materials, scarce technical labour and the risk of delays from licence checks or failed inspections. Outbound works better when it speaks to audit readiness, traceability, bid response time, delivery reliability or margin protection. Claims need evidence, because buyers in this market are used to checking certificates, standards and delivery history.
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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