About Us
We have been providing drug testing and occupational medical services to organisations and private individuals in London since 2010. Our extensive experience, commitment to exceptional customer service, and our unique network of drug testing clinics and on-site mobile services across London enable us to deliver on our core values of convenience, confidence, and support.
Our journey began in 2005, when Nichola McChrystal founded DNA Clinics with a mission to offer trusted clinical bio-testing services. Since then, we have stayed true to our ethical principles and proudly remain a women-led, independently owned business. Our dedication to integrity, innovation, and client care continues to drive us as we expand our services and uphold the highest industry standards.
Our aims
At Crystal Health Group, our mission is to deliver exceptional convenience, confidence, and support to every client at every step of their journey. Whether you’re booking a simple test or navigating a more complex assessment, our dedicated team ensures a seamless experience from start to finish.
We prioritise your needs by offering flexible appointment options, transparent communication, and expert guidance. Our commitment to excellence means that you can trust us to provide accurate results and comprehensive support, empowering you with the information you need when it matters most.
Convenience
We maintain an extensive network of drug testing clinics and mobile sample collection services across Greater London, making it easy for clients to access our services wherever they are. Our strategically located clinics provide flexible options for both private individuals and businesses, ensuring minimal disruption to your schedule.
In addition, we are committed to expanding our network by identifying any gaps in coverage and working diligently to address them, so we can offer even greater accessibility and convenience to all our clients.
Confidence
We are dedicated to upholding the high standards we have achieved through our ISO certification and industry-specific accreditations, such as RISQS. These certifications reflect our commitment to quality, safety, and reliability in all our services.
In addition, we strictly comply with GDPR regulations to safeguard your personal data, supported by our data protection registration. Our collection of biological samples adheres to the Human Tissue Act 2004, ensuring ethical and legal compliance at every stage.
Through a culture of continuous improvement, we strive for excellence by collaborating with new accreditation bodies within the occupational health sector, further enhancing our services and reinforcing your trust in Crystal Health Group.
Support
At Crystal Health Group, we are committed to providing comprehensive post-testing support to ensure our clients feel informed and supported throughout their journey. This includes access to counselling services at selected clinics, expert witness support, and medical review services tailored to your needs.
Our Clinical Advisor team brings extensive scientific knowledge and experience to offer ongoing guidance following your test or medical assessment results. Whether you need clarification on your report or advice on next steps, our experts are here to provide the reassurance and information you need for complete peace of mind.
Accreditation
We focus on delivering compliant, high-quality services in the occupational health and private testing sector across London. Our certified management systems for quality, information security, and environmental management ensure our clinics and mobile services meet the highest standards.
We hold RISQS Network Rail Accreditation, enabling us to provide drug and alcohol testing and PTS medical assessments in full compliance with Network Rail safety standards. We are also ICO-registered under ZA260675, ensuring GDPR-compliant data handling.
Certified Quality Management System
ISO 9001
Our certified ISO 9001 quality management system enables us to continuously review and improve the drug testing services we provide across London. Built on established, industry-recognised principles, this system ensures a strong customer focus, a streamlined, process-driven approach, and a commitment to ongoing enhancement.
By adhering to these standards, we deliver reliable, accurate drug testing solutions that meet the needs of both private individuals and organisations while maintaining the highest levels of service excellence.
Certified Information Security Management System
ISO 27001
Maintaining our certified information security management system equips us to address the modern data protection challenges faced by organisations today. We continually assess the risks involved in obtaining, processing, and storing our clients' personal information to ensure our processes and systems comply fully with GDPR regulations.
This commitment to robust data protection underpins the integrity of our drug testing services across London, providing clients with the confidence that their sensitive information is handled securely and responsibly at every stage.
Certified Environmental Management System
ISO 14001
We are committed to reducing our environmental impact across all drug testing services in London through our certified environmental management system. Key initiatives include transitioning to renewable energy at our clinics, minimising waste during sample collection, reducing travel through mobile testing units, and promoting environmental awareness among our staff to ensure sustainable operations.
By implementing these measures, we aim to deliver high-quality drug testing services while supporting a greener, more sustainable future.
Network Rail Accreditation RISQS
Rail Industry Supplier Qualification Scheme
The Rail Industry Supplier Qualification Scheme (RISQS) is an audit-based accreditation that certifies suppliers to deliver safety-critical services to Network Rail. Our RISQS accreditation enables us to provide compliant drug and alcohol testing services across London for individuals working on the UK rail infrastructure.
With our accredited clinics and mobile testing options, we offer convenient and reliable sample collection services that meet the rigorous safety and compliance standards required by the rail industry. Whether you need pre-employment screenings, random testing, or post-incident testing, our London-based services are designed to support workplace safety and regulatory compliance.
Disability Confident Employer
Disability Confident
As a recognised Disability Confident Employer, we are committed to fostering an inclusive and supportive workplace. Our achievements include:
- Successfully completing the Disability Confident self-assessment, demonstrating our commitment to accessibility and inclusivity.
- Implementing all core actions required to maintain our status as a Disability Confident employer, ensuring that our processes and practices are fair and inclusive at every level.
- Taking proactive steps to attract, retain, and develop talent by offering initiatives to recruit the right individuals for our business and supporting the growth and development of our team.
Laboratory Accreditation
UKAS 17025
All laboratory drug testing services in London are conducted in UKAS 17025 accredited facilities within the UK. This accreditation guarantees that our testing processes meet the highest standards of accuracy and reliability.
As a result, our laboratory drug test results are admissible for legal purposes, providing trusted and compliant evidence for workplace assessments, court cases, and safety-critical requirements across London.
Head Office
Crystal Health Group
The Old Chapel
Manchester
M30 0NG