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Detecting cancer early

Volunteer to help the NHS with research into early cancer detection

A new way to screen for cancer

The NHS is trialling a new blood test to detect cancer, often before symptoms appear.

You can volunteer to take part in the trial if you get an invitation letter from the NHS and all of the following are true:


You are aged 50 to 77


You have not been diagnosed or treated for cancer in the last 3 years


You are registered with a GP in one of the areas where the trial is taking place

A test to detect many cancer types

Detecting cancer early often means it can be treated more successfully. The new blood test is designed to detect more than 50 types of cancer, even before symptoms appear.

The test is most likely to benefit people who are aged 50 and over, as they are at a higher risk of developing cancer.

Research to find cancer earlier

The NHS-Galleri trial is a research trial to see how well the new Galleri™ test works in the NHS. The aim is to see whether the test finds cancer earlier when combined with standard cancer testing in people who don’t have any symptoms of cancer.

The trial will be run by the Cancer Research UK & King’s College London Cancer Prevention Trials Unit, a team of cancer researchers and trial managers at King’s College London (King’s).

GRAIL, LLC is a company in the United States that developed the Galleri test. They have also set up a branch in the UK, GRAIL Bio UK Ltd. (GRAIL) which is the main funder and organiser of this trial. The study is in partnership with the National Health Service (NHS) England.

King’s College London Cancer Research UK & King’s College London Cancer Prevention Trials Unit

Taking part is voluntary

If you get a letter from the NHS you can volunteer for the trial. You will need to follow the steps on your invitation letter to find out if you are eligible to take part. You will then be invited to provide a blood sample and answer some general health questions at a mobile clinic local to you. You will be invited back to give another sample after 12 months and again after 2 years.

Benefiting people in the future

By taking part you will be contributing to research which may benefit people in the future. If the trial finds that the Galleri test can detect cancer earlier when used with standard cancer testing in the NHS, then more cancers could be successfully treated.

You may not benefit directly from taking part in this trial.

Your invitation letter

If you live in one of the areas where the trial is being run and you are eligible to take part, the NHS may contact you. Look out for your invitation letter in the post.

Taking part in the NHS-Galleri trial is completely voluntary.

If you do not wish to receive an invitation to join the NHS-Galleri trial, you can contact the NHS on 0300 303 5678 or visit the NHS Digital website.

NHS Digital is the national custodian of health and care data in England. It collects and holds some information from the patient records that health and social care providers collect and maintain.