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Basis of your participation

Thank you for participating in UK Biobank, your contribution in both data and time is enabling global researchers to investigate the causes and treatment of a wide range of life-altering diseases. 

Upon joining the project you gave consent for UK Biobank to collect, store and make available a range of data about you, and for us to follow your health over time in the interest of health-related research. This has created an unmatched wealth of data, which is providing researchers with data to make new scientific discoveries to improve health.

On this page you can read more the consent form you signed some years ago, how to withdraw, should you wish to, and how we process your data within the General Data Protection Regulation (GDPR).

Information about the GDPR for UK Biobank participants

The purpose of the information on this page is to draw your attention to certain parts of the General Data Protection Regulation (GDPR) about which we are required to tell you by the legislation. (Whenever we refer to the “old law” we mean the Data Protection Act 1988, and whenever we refer to the “new law” we mean the GDPR.)

We wrote to all participants when the GDPR was introduced in May 2018 and you can view a copy of that letter here.

We should like to assure you that we will only process, store and use your data in a manner that is consistent with the basis on which you joined UK Biobank (as described in the information materials and consent form. In particular, your information will continue to be made available only to bona fide researchers undertaking health research that is in the public good.

UK Biobank data and GDPR

UK Biobank’s lawful basis for processing your data

A legal requirement of the GDPR is that we tell you about the legal basis on which UK Biobank will process your personal data. This includes information about you (like your name and address), the information that you told us about (such as answers to questions about your lifestyle), and information that we have received from others (such as your health records).

Because of the health-related nature of the personal information that you have provided to us, there are two lawful bases for our processing of it, which are referred to in the legislation as “legitimate interests” and “consent”.  UK Biobank believes that both of these are valid reasons for processing your data and, as is required by the law, we have set our reasoning below.

Legitimate interest

Legitimate interests are defined in the GPDR as “processing which is necessary for the purposes of the legitimate interests pursued by the controller or by a third party, except where such interests are overridden by the interests or fundamental rights and freedoms of the data subject which require protection of personal data, in particular where the data subject is a child”.

In this case, UK Biobank is defined as the “data controller”. In the GDPR, there is a 3-step test to demonstrate “legitimate interests” which we have set out as a series of questions and answers:

Legitimate interest purpose test: what are UK Biobank’s legitimate interests? 

  • What is UK Biobank trying to achieve? Our objective is to set up and manage a major international research resource for health-related research that is in the public interest.
  • Who benefits from UK Biobank’s processing? Patients and the wider public benefit from the advances made in the prevention, diagnosis and treatment of disease.
  • How significant/important are these benefits? UK Biobank is now one of the largest and most used health research resources in the world. Over 6,000 institutions are registered with us and over 1,000 health-related research applications have been approved.

Legitimate interest necessity test: is the processing necessary for the legitimate interests? 

  • Is processing personal data a reasonable way to achieve the objective? Without the personal data provided voluntarily by you and the other participants, UK Biobank would not exist.
  • Is there another less obtrusive way to meet our purposes? Your data are stored in a way that makes it is extremely difficult even for UK Biobank to re-identify you. Only a very few individuals within UK Biobank are allowed to do so (and they are strictly monitored) in order that further information about you can be added. Data provided to researchers have personal identifiers removed so that an individual participant cannot be identified. There are no circumstances in which your data can be processed in a manner that could have an adverse impact on you.

Legitimate interest balancing test:  UK Biobank has to weigh up the participant’s interests.

  • Would participants expect UK Biobank to use their data this way? Yes; this is what we set out in the information materials provided to participants and in the consent form each of them signed.
  • How likely would a participant be to object?  In our view, this is very unlikely. During the past 10 years since participants joined UK Biobank during 2006-10, fewer than 800 of the 500,000 participants have withdrawn from the study and asked that we delete all of their information.

For completeness, we should add that there is a further requirement under the GDPR for processing “special categories of data” and this includes data concerning an individual’s health.  This requirement can be satisfied if the processing is necessary “for reasons of public interest in the area of public health of for archiving purposes in the public interest, scientific or historical research purposes ….” The GDPR specifies that “research purposes” include “studies conducted in the public interest in the area of public health”.  We consider that UK Biobank’s activities fall squarely within this requirement.


Each person who joined UK Biobank provided their explicit consent for us to collect, store and make available information about them (including data from genetic and other assays of the samples that were collected) for health-related research, and for their health to be followed over many years through medical and other health-related records, as well as by being re-contacted by UK Biobank.

Under the GDPR, explicit consent needs to satisfy each of the following 6 criteria: 

  • Freely given: your consent was not provided as a precondition for a service or a benefit
  • Presented separately from other information: a separate consent form from the information materials was provided which all participants signed (see: Consent Form)
  • Based on properly explained information: all participants were provided with the relevant information materials which described how UK Biobank would use their information to support health-related research that is in the public interest (see: Information Leaflet)
  • Could be refused and easily withdrawn: all participants volunteered to join UK Biobank after having the chance to review the information materials and ask any questions that they had, and any participant can withdraw for any reason at any time (see: Withdrawal Form)
  • Provided for specific purposes: there was a set of separate points on the consent form related to specific purposes to which participants had to agree before signing the form
  • Named third party controllers relying on the consent: UK Biobank does not provide data to researchers which can be used to identify participants. Instead, personal identifiers are removed from the data provided to researchers and UK Biobank’s legal agreement with these researchers requires them to restrict their use of the data for their approved research and not to try to identify any participant.  This means that, for the purposes of the GDPR, it is no longer “personal data” and so this criterion is not relevant.

The National Data Opt Out

The national data opt out programme became live on 25th May 2018. This enables any individual in the UK to notify the NHS that they only want their personal data to be used for their own health care purposes.  However, if any UK Biobank participant elects to use the opt-out this will not exclude them from UK Biobank.  In order to withdraw from UK Biobank, any participant has to withdraw by notifying UK Biobank in the normal way.

Find out more about the National Data Opt Out  GDPR Note

Your rights under the GDPR

Pursuant to the GDPR individuals have a number of rights which were not part of the old law. These new rights do not change your relationship with UK Biobank and fall into two categories:

Rights of access: All participants joined UK Biobank on the explicit understanding (as described in the information leaflet and consent form) that there would be no feedback of any information that was discovered about them from using their data. The reason for taking this “no feedback” approach was that it was considered likely that providing feedback would prevent or impair the research purposes of UK Biobank. Both the old law and the GDPR have provisions which allow research projects (like UK Biobank) not to provide participants with their data.

Rights to restrict processing, to be forgotten, erasure and withdrawal: these rights are covered by your ability to withdraw from UK Biobank at any time for any reason (although we very much hope that you choose not to exercise that right so that your data can continue to be used to help researchers study the causes, prevention and treatment of many different diseases).

Participants have the right to contact the UK’s data protection authority – the Information Commissioner’s Office (ICO) - if they have any concerns about UK Biobank’s use of personal data and/or UK Biobank’s approach to data protection and the GDPR.

Protecting your data

UK Biobank stores all your data securely and to the highest industry and professional standards.  It undertakes regular testing of its IT systems to ensure that they are robust. UK Biobank also commissions external experts to test the security of our systems.

Before UK Biobank provides data to researchers, we first remove all the personal identifiers so that individual participants cannot be identified. In addition, your data are only provided to researchers on the execution of a legal agreement prohibiting the researcher from trying to identify a participant.

Only UK Biobank has access to participants’ data with the personal identifiers (which is necessary in order to allow us to add more information about each participant as it becomes available) and we restrict the number of individuals within UK Biobank who have access to these personal identifiers.

Retention of data

UK Biobank will store participants’ data for as long as it has a legitimate interest in doing so. The UK Biobank project is a long-term study and participants’ data will be kept for the duration of the project as set out in the consent provided by each participant who joined UK Biobank. However, should a participant wish to leave UK Biobank they can do so at any time.

Data Protection Officer

We have a Data Protection Officer (DPO) who can be contacted with any questions or concerns relating to UK Biobank’s approach to data protection and the GDPR. Please write to the DPO using or via post: The Data Protection Officer, UK Biobank, Units 1-2 Spectrum Way, Adswood, Stockport, SK3 0SA.

Withdrawal from UK Biobank

You are free to withdraw at any time from the study without giving us a reason. You are welcome to discuss concerns with us at any time, and the various options you have for withdrawal.

Contact PRC

Participants can withdraw at one of three levels:

No further contact

This means that UK Biobank would no longer contact the participant directly but would have permission to retain and use information and samples provided previously and to obtain and use further information from health records. This level of withdrawal leaves the resource intact and will allow researchers to study disease with the goal of improving the health of future generations. If you wish ‘No further contact’, please speak to the UK Biobank Participant Resource Centre on 0800 0 276 276 (freephone number) since there are a number of options available (for instance, you could request that UK Biobank does not contact you to ask for further help, but that you still receive the annual newsletter).

No further access

This means that UK Biobank would no longer contact the participant or obtain further information from health records in the future, but still has permission to use the information and samples provided previously. You need to contact UK Biobank by phone, email, or letter to request a Withdrawal Form.

No further use

In addition to no longer contacting the participant or obtaining further information, any information and samples collected previously would no longer be available to researchers. UK Biobank would destroy samples (although it may not be possible to trace all distributed sample remnants) and would only hold information for archival audit purposes. Such a withdrawal would prevent information about the participant from contributing to further research, but it would not be possible to remove data from research that had already taken place. You need to contact UK Biobank by phoning the Participant Resource Centre on 0800 0276 276, email us at, or you can send us a letter at the address on this page to request a Withdrawal Form.

UK Biobank contact details

If you want to contact UK Biobank you can do so as follows:

The UK Biobank free phone Participant Resource Centre is open on 0800 0 276 276 Monday – Friday 9am – 5pm. Calls from mobile phones or from overseas may be charged.

You can write to UK Biobank at:

1-2 Spectrum Way

You can also contact the UK Biobank DPO at any time using the contact details set out in the DPO box above.

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