Clinical Trials of Investigational Medicinal Products (CTIMPs)

Last updated on 2 May 2025

Currently applicable legislation 

Legislation sets out how drug trials are approved, conducted, monitored and reported. 

Clinical trial regulations reform

The UK's clinical trial regulations are changing.

In April 2025 a series of proposed updates to the UK's clinical trial regulations were approved. This marked the start of a 12 month implementation period with the updated regulations coming into force in April 2026.

During the implementation period we will be publishing guidance to explain what has changed and what you need to do to be prepared.

Find out more

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