Registration on a public database is mandatory for the following studies:

  • Clinical trial of an investigational medicinal product (CTIMP)
  • Clinical investigation or other study of a medical device
  • Combined trial of an investigational medicinal product and an investigational medical device
  • Other clinical trial to study a novel intervention or randomised clinical trial to compare interventions in clinical practice.

If your research falls into any of the above categories, you must make sure you register your study BEFORE enrolment of the first patient; otherwise you may not be able to publish.

The only registries that currently meet UoA/NHSG criteria are and the ISRCTN Register (

Detailed guidance about registration is given in IRAS.

Planning Research


Study Design Facilities Scientific Peer Review Secure Funding Prepare study documentation Sponsorship Protocol Contracts Registration on public database Finalise study documents Statutory Approvals Ethics Review