The Over-Volunteering Prevention System (TOPS) is run by the Health Research Authority. If you are having trouble accessing your account or your account has not yet been setup, or if you require general support or guidance, please contact tops@hra.nhs.uk or alternatively call 0207 104 8122 / 0207 104 8055.

ADVANCE NOTICE: The system will not be available from 19:00 to 23:00 (BST) hours on Thursday 22 October 2020 whilst essential maintenance work is carried out.



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The Over-Volunteering Prevention System (TOPS) is run by the Health Research Authority and helps prevent volunteers from taking part in trials of new medicines too frequently.
All personally identifiable information gathered is securely held and fairly processed.

Our updated privacy policy can be found, here.