When your systems start glitching or slowing down, it can feel like you’re flying blind. That’s where system diagnostics companies come in. These are the people who dig into the details, find out what’s really going on under the hood, and fix issues before they turn into something bigger (and usually more expensive).
Across the UK, there are plenty of companies offering diagnostics in different ways – some focus on IT networks, some on healthcare, others on hardware reliability. Below, I’ve pulled together a list of names worth knowing, with a quick look at what they do and how they can help.
1. A-listware
At A-listware, we focus on providing IT outsourcing and staffing services that connect businesses with skilled software developers. Our approach is simple: we handle the recruitment and management process so that companies can concentrate on their core goals. By working with us, clients can build remote development teams without needing to manage the time-consuming aspects of interviews and hiring themselves. We are also a system diagnostics company that provides its services to the UK. We believe that well-matched developers are a key factor in building strong organisations. That is why we put effort into ensuring teams are fluent in communication, accessible, and able to integrate smoothly into ongoing projects. By offering both technical expertise and structured support, we aim to make collaboration with remote teams straightforward and reliable.
Key Highlights:
- Provides IT outsourcing and staffing services
- Focuses on building and managing remote development teams
- Developers fluent in English for effective communication
- Streamlined process covering recruitment and management
Services:
- IT outsourcing
- Remote team recruitment and management
- Software development staffing
- Ongoing support for outsourced teams
Contact Information:
- Website: a-listware.com
- E-mail: info@a-listware.com
- Facebook: www.facebook.com/alistware
- LinkedIn: www.linkedin.com/company/a-listware
- Address: St. Leonards-On-Sea, TN37 7TA, UK
- Phone: +44 (0)142 439 01 40
2. Quest Technologies
Quest Technologies is one of those companies that wears a lot of hats. They work with businesses, schools, and even the public sector, helping with IT consulting, system integration, and ongoing tech support.
What makes them stand out is how they mix practical problem-solving with forward-thinking ideas. Whether it’s fixing an existing setup or designing something from scratch, their focus is always on keeping things simple and effective.
Key Highlights:
- Offers IT consulting for businesses, schools, and public sector
- Supports both existing system integration and new system development
- Focuses on practical solutions for operational efficiency
- Applies new thinking to improve technology usage
Services:
- IT consulting and advisory
- System integration
- Design and development of IT solutions
- Continuous IT operations support
Contact Information:
- Website: questtechnologies.co.uk
- E-mail: info@questtechnologies.co.uk
- Facebook: www.facebook.com/questtechuk
- Twitter: x.com/questtechuk
- Address: 195 Whitecross St, London EC1Y 8QP
- Phone: +44 207 250 0147
3. KEZ Services
If your laptop’s crawling or your desktop’s full of viruses, KEZ Services is the kind of place you call. They handle everyday tech headaches like software installs, virus removal, and repairs – but they also offer rentals and accessories if you need something short-term.
They’re quick, practical, and they don’t just fix the problem and walk away. They also give advice to stop the same issue from happening again, which is always a bonus.
Key Highlights:
- Offers computer and laptop repair services
- Provides technical support and software installation
- Focuses on practical, ongoing device management
- Handles additional services like device rentals and phone accessories
Services:
- Laptop and computer repair
- Virus removal and software installation
- Device rentals
- Technical assistance and support
- Phone accessories
Contact Information:
- Website: kezservices.co.uk
- E-mail: info@kezservices.co.uk
- Address: 63 Fairholt Rd, London N16 5EW, UK
- Phone: 020 3886 0045
4. Eurosoft (UK) Ltd
Eurosoft is all about reliability. They provide hardware testing tools and IT support for organisations that can’t afford downtime – think system integrators, refurbishers, and retailers.
Their tools help make sure systems are running smoothly and consistently, whether it’s in a repair shop or a big IT environment. They’ve been around long enough to know how to get accurate results every time.
Key Highlights:
- Supplies hardware testing tools and solutions
- Works with OEMs, system integrators, retailers, and refurbishers
- Focuses on reliability and practical IT operations
- Supports various IT environments including repair and refurbishment
Services:
- Hardware testing solutions
- System integration support
- IT servicing and repair support
- Support for ITAD and refurbishing operations
Contact Information:
- Website: www.eurosoft-uk.com
- E-mail: info@eurosoft-uk.com
- Facebook: www.facebook.com/eurosoft.uk
- Twitter: x.com/eurosoftuk
- Address: 3 St Stephen’s Road Bournemouth BH2 6JL United Kingdom
- Phone: +44 (0)1202 297 315
5. Osler Diagnostics
Inspired by Sir William Osler, these guys are all about making health information easier to access and understand. Their focus is on tools that let people monitor their health from anywhere without getting lost in complicated data.
It’s less about high-end analytics and more about clarity and usability, which makes their solutions really approachable for everyday users.
Key Highlights:
- Focuses on accessible health diagnostics
- Supports individual understanding of health data
- Emphasises practical, user-friendly solutions
Services:
- Health monitoring tools
- Diagnostic support services
- Data interpretation guidance
- User-focused health information access
Contact Information:
- Website: www.oslerdiagnostics.com
- E-mail: osler@oslerdiagnostics.com
- Twitter: x.com/OslerDx
- LinkedIn: www.linkedin.com/company/oslerdiagnostics
- Address: King Charles House Oxford OX1 1JD United Kingdom
- Phone: 01865 655474
6. Spirent
Spirent provides automated test and assurance solutions for networks, cybersecurity, and positioning systems. Their tools are used to evaluate technology performance in both lab environments and real-world conditions, supporting the development and deployment of new products.
They focus on providing repeatable, systematic testing that helps organisations understand how their systems will behave under different conditions. The work spans technology development stages, helping teams validate solutions before wider release.
Key Highlights:
- Automated test and assurance solutions
- Covers networks, cybersecurity, and positioning systems
- Supports lab and real-world testing
- Used to evaluate technology throughout development
Services:
- Network and system testing
- Cybersecurity evaluation
- Positioning and connectivity verification
- Performance monitoring and reporting
Contact Information:
- Website: www.spirent.com
- E-mail: academia.office@spirent.com.
- Facebook: www.facebook.com/spirent
- Twitter: x.com/Spirent
- LinkedIn: www.linkedin.com/company/spirent-communications
- Instagram: www.instagram.com/spirent_
- Address: 108 High Street Crawley, West Sussex RH10 1BD United Kingdom
- Phone: +44 (0)1293 767676
7. NHS Digital
NHS Digital designs, develops, and operates national IT and data services for healthcare in the UK. Their work supports clinicians at work, helps patients access care, and uses health data to improve research and treatment.
They focus on building systems that integrate clinical workflows with digital tools, enabling staff to work efficiently while maintaining secure and accurate health records. The emphasis is on operational support, data accessibility, and improving service delivery rather than direct patient care.
Key Highlights:
- Develops and operates national health IT services
- Supports clinicians and patient care
- Uses health data to inform research and improve services
- Integrates digital tools with clinical workflows
Services:
- National IT and data service management
- Clinical workflow support
- Health data collection and analysis
- Digital infrastructure for healthcare
Contact Information:
- Website: digital.nhs.uk
- E-mail: england.contactus@nhs.net
- Twitter: x.com/nhsdigital
- LinkedIn: www.linkedin.com/showcase/nhs-transformation-directorate
- Address: 10 South ColonnadeCanary Wharf London E14 4PU
- Phone: 0300 303 5035
8. The Lee Company
The Lee Company works in the field of fluid control technology and provides solutions that are often used in demanding environments. Their work extends to diagnostic equipment, where accuracy and reliability are central to applications in healthcare and research. The company’s engineers collaborate closely with clients to address specific technical requirements and provide tailored solutions when needed.
With decades of experience in fluid control, they apply advanced manufacturing processes and technical expertise to ensure equipment can perform under critical conditions. Their role in diagnostics highlights their contribution to enabling repeatable and precise testing that supports medical professionals in making timely decisions.
Key Highlights:
- Focus on fluid control technology
- Involvement in diagnostic equipment for healthcare use
- Collaboration with clients through technical engineers
- Longstanding expertise in precision manufacturing
Services:
- Fluid control components
- Customised fluid control solutions
- Technical engineering support
- Diagnostic equipment components
Contact Information:
- Website: www.theleeco.com
- E-mail: sales@leeproducts.co.uk
- Facebook: www.facebook.com/TheLeeCo
- Twitter: x.com/TheLeeCo
- LinkedIn: www.linkedin.com/company/the-lee-company
- Address: 3 High Street Chalfont St. Peter, Gerrards Cross Buckinghamshire SL9 9QE England
- Phone: +44 1 753 – 886664
9. G&H
G&H operates across multiple industries, providing photonics engineering and manufacturing solutions. Their expertise spans telecoms, aerospace, defense, space, and life sciences, where optical technologies play an important role in system performance. They combine design and engineering capabilities with manufacturing to support a wide range of applications.
In the medical field, G&H | ITL focuses on devices such as in-vitro diagnostics and laboratory instruments. Their approach covers the entire development cycle, from design through to production, supporting clients who need both technical precision and dependable manufacturing processes.
Key Highlights:
- Specialises in photonics engineering
- Works across telecoms, aerospace, defense, space, and life sciences
- Provides integrated design and manufacturing capabilities
- Dedicated services for medical and diagnostic equipment
Services:
- Photonics engineering solutions
- Design and manufacturing for medical devices
- In-vitro diagnostic development
- Laboratory instrument support
Contact Information:
- Website: gandh.com
- E-mail: info@gandh.com
- Twitter: x.com/ghphotonics
- Instagram: www.instagram.com/gandhphotonics
- Address: Viking House Ellingham Way Ashford Kent TN23 6NF UK
- Phone: +44 1233 638383
10. Dxcover
Dxcover is doing some really exciting work around cancer detection. They use liquid biopsy (basically testing blood samples) combined with AI to catch cancer earlier than traditional methods.
The goal is simple but powerful: detect cancer early enough to improve survival rates and quality of life. Their tools are designed to be accurate but also accessible to healthcare providers everywhere.
Key Highlights:
- Works in cancer detection through liquid biopsy
- Integrates artificial intelligence with diagnostic testing
- Focuses on early detection of cancer
- Aims to improve accessibility of diagnostic tools
Services:
- Liquid biopsy technologies
- AI-supported diagnostic solutions
- Cancer detection tools
- Research and development in early diagnosis
Contact Information:
- Website: www.dxcover.com
- Twitter: x.com/dxcover
- Address: Suite RC534, Royal College Building 204 George Street Glasgow G1 1XW
11. Fortress Diagnostics
Based in Northern Ireland, Fortress Diagnostics manufactures a wide range of in-vitro diagnostic (IVD) tests. Their kits cover everything from immunology to haematology and are shipped to hospitals, clinics, and labs around the world.
They’re all about quality and consistency, making sure their products meet strict standards so healthcare providers can rely on them.
Key Highlights:
- UK-based manufacturer of in vitro diagnostics
- Supplies tests in immunology, haematology, and serology
- Products used in hospitals, clinics, blood banks, and research institutions
- Distributed internationally through established networks
Services:
- Development of IVD tests
- Manufacturing of diagnostic kits
- Support for clinical laboratory testing
- Distribution to global healthcare facilities
Contact Information:
- Website: www.fortressdiagnostics.com
- E-mail: info@fortressdiagnostics.com
- Facebook: www.facebook.com/fortressdiagnosticsltd
- Twitter: x.com/fortressdiag
- LinkedIn: www.linkedin.com/company/fortress-diagnostics-limited
- Instagram: www.instagram.com/fortressdiagnostics_
- Address: 9A The Technology Park, Antrim, United Kingdom, BT41 1QS
- Phone: +44 (0) 2894 487676
12. LEX Diagnostics
LEX Diagnostics develops molecular diagnostic systems with a focus on speed and sensitivity. Their PCR-based platform is designed to deliver results within minutes, making it suitable for point-of-care testing environments where time is critical. By enabling tests to be carried out during a single appointment, their system supports efficiency for both patients and healthcare providers.
The company’s approach combines high sensitivity with rapid turnaround, aiming to provide accurate results without long waiting times. Their technology is positioned to play a role in expanding access to molecular diagnostics beyond central laboratories.
Key Highlights:
- Developer of PCR-based molecular diagnostic systems
- Focuses on rapid results within minutes
- Designed for point-of-care use
- Combines high sensitivity with speed
Services:
- PCR molecular diagnostic systems
- Point-of-care testing solutions
- Rapid result reporting
- Development of high sensitivity diagnostic tools
Contact Information:
- Website: lexdiagnostics.com
- E-mail: enquiries@lexdiagnostics.com
- LinkedIn: www.linkedin.com/company/lexdiagnostics
- Address: Melbourn Science Park Melbourn, SG8 6EE UK
- Phone: +(44) 1223 752 144
Conclusion
System diagnostics in the UK isn’t just one thing – it’s a mix of IT firms, medical testing innovators, and companies making the behind-the-scenes tools that keep everything running. Whether it’s catching hardware faults early, making sure networks are secure, or spotting health issues before they become serious, these companies all share the same goal: keeping systems dependable.
