• Next Day DNA testing


    A history of innovation and service excellence,
    with an international reputation for quality.

  • Forensic quality DNA and drug testing

    UKAS Accredited Service.

    A history of innovation and service excellence,
    with an international reputation for quality.

  • Next Day DNA Testing,
    as Standard.

    UKAS Accredited Service.

    The UK's Most Experienced DNA Testing Service
    Established in 1987.

  • DNA testing

    Awarded UK Government

    A history of innovation and service excellence,
    with an international reputation for quality.

The UK's most experienced DNA tester.

Formerly part of one of the largest global pharmaceutical and chemical companies Cellmark was the world's first commercial DNA fingerprinting laboratory and today is one of the most trusted forward thinking DNA analysis companies in Europe.

DNA testing for 30 years

Since 1987 Cellmark has conducted hundreds of thousands of DNA tests. Our reputation for quality and customer service is recognised by our wide range of customers including members of the public, local authority Children's Services teams, government departments and the legal profession.

MOJ Accredited

As a member of the Ministry of Justice's list of accredited bodies, Cellmark has been accredited to carry out parentage tests directed by the civil courts in England and Wales under section 20 of the Family Law Reform Act 1969.

Cellmark delivers the complete package


DNA testing

The UK's most experienced DNA tester and the world's first private DNA fingerprinting company.



DNA testing

Our results are accepted by the UK Visas and Immigration department and by countries around the globe.



DNA testing

Used to determine whether two people share biological parents, when parents are not available for testing.



Hair strand testing

Our laboratory is accredited by the United Kingdom Accreditation Service (UKAS) to the International Standard ISO/ IEC 17025:2005 to test for a wide and expanding range of drugs in hair.



Hair strand testing

Cellmark offers an alcohol testing service to test for chronic excessive alcohol consumption. As a minimum we recommend our standard package which includes both Hair and Blood sample testing.


Customer Service

The Complete Package

Cellmark seeks to deliver the highest possible quality standards – from the moment you first contact us, throughout the case management and testing process right up to the release of the test results.

DNA testing Next Day as standard from Cellmark

Next Day DNA

As Standard

Cellmark delivers a next day DNA Relationship testing service - as standard - across our range of tests - including immigration and sibling cases.

With no hidden extras

“Our accredited hair drug & alcohol testing service is simple to understand, easy to organise and delivers comprehensive results.”


Solicitors and barristers

Cellmark is the company of choice for many of the UK's leading legal practitioners.

Cellmark is accredited by the Ministry of Justice as a body that may carry out parentage tests as directed by the civil courts in England and Wales under section 20 of the Family Law Reform Act 1969.

More information


Local authorities

The combination of our DNA and drug and alcohol testing services provide local authority solicitors and social workers with the ability to establish the true nature of individuals familial relationships.

The results of our testing can provide significant evidence for cases involving the care, custody and adoption of children.

More information


Healthcare Professionals

Cellmark participated in the development of the original Department of Health voluntary Code of Practice on Genetic Testing, launched in 2001.

We still abide by its principles and those of its replacement the Human Genetics Commission's "Common Framework of Principles".

More information


People just like you

Paternity testing is not a decision which should be entered into lightly. Please consider whether this is the best course of action for any children involved.

It may help you to discuss the issues and possible outcomes with a third party, either a friend or family member or an independent advice service.

More information

Confidential, court approved and conclusive.

  • Trusted
  • Rapid service
  • Accredited
  • Free advice
  • It's in our DNA

    Cellmark is contracted to provide forensic DNA testing for most of the UK’s police forces and we are trusted by government departments, family law solicitors and people just like you - we're part of the world’s largest paternity testing company.

    Established in 1987 Cellmark pioneered the introduction of DNA analysis for paternity testing and is the UK's most experienced DNA tester.

  • Next day DNA

    Thanks to the advances in DNA testing technology Cellmark delivers Next Day results as standard using the most conclusive genetic marker systems with a minimum of 22 markers analysed - across our range of DNA relationship testing services - that includes - Paternity, Maternity, Sibling, Avuncular, Grandparentage and Immigration dna tests. If your samples reach us by 10am we can get the test report to you by the end of the next working day!

    We provide the same, industry leading, quality of testing, analysis and customer service that we have since June 1987 - it's just that things have got a little faster!

  • ISO17025

    Our laboratory in Abingdon, Oxfordshire is accredited to ISO17025 and certified to ISO9001, ISO14001 and ISO27001 international quality standards. This means you can be sure your test will be carried out reliably with care, accuracy and precision.

    Cellmark is accredited by the Ministry of Justice to carry out parentage tests directed by the civil courts in England and Wales under section 20 of the Family Law Reform Act 1969.

  • Customer service

    We're here to provide help and assistance. Call our customer services team on 0800 036 2522 Mondays 8.30am-7pm and Tuesday-Friday 8.30am-6pm - or text us, email us or "chat" to us. We are here to help!

  • "I wanted to thank you so much for your help with this case. You really made this happen and we had the hearing today. Things will now be sorted out so much more quickly for this baby because of your efforts."

    Local Authority Childcare Team
  • "To Cellmark, Firstly I would like to say thank you to all of you for a great service. Just last night I revived my DNA reports well with in my deadline period. Secondly the reason why I chose Cellmark out of 4-5 DNA companies from the list given was due to the fact that Cellmark responded to all my inquiries efficiently, professionally and promptly. Other companies were quite poor in that so I decided to go ahead with Cellmark."

    Unsolicited testimonial
  • "I would like to thank you and the Cellmark team for the first class customer service you gave me, the timely responses and the efficiency. My first time using Cellmark but I will definitely recommend to everyone. Your service can't go unnoticed and I hope your managers recognise that."

    Private Individual
  • "Thank you very much for getting the results back to us so quick and in time for the hearing...... You’ve all been a massive help!"

    Family Law Solicitor
  • "May I take this opportunity to say how very pleased and impressed I am with your firm’s efficiency and professionalism, as well as your flexibility. I have been using a variety of different firms for DNA and drug and alcohol testing for years as solicitor for the local authority, before I found you, none others have the approach with all the staff members that I was seeking, or the speed at which you respond to queries, issues etc.. before I came across Cellmark. Thank you."

    Local Authority


Customers have used our DNA testing service

Forensic quality

Hair drug testing - simple yet comprehensive

If you are ready to proceed then click or call the number
below to begin your case registration.