# Clinical investigations: compiling a submission

Source: https://www.keypedia.com/records/uk_mhra_guidance/uk-mhra/021a62d6-685e-4d2f-8785-14ede1be67d6
Type: Guidance
Published: March 31, 2026

> The UK Medicines and Healthcare products Regulatory Agency (MHRA) has issued guidance to assist manufacturers in the preparation and submission of clinical investigation applications. This regulatory framework is designed to ensure that all clinical trials meet rigorous safety and data standards. Although this specific text does not detail an individual company inspection or specific violations, it addresses the broad requirement for complete and accurate documentation during the application process. Manufacturers must include a standardized set of core documents for all submissions, alongside supplementary information tailored to specific investigative circumstances. Required actions for manufacturers include a thorough internal review of all technical files and safety protocols before submission to prevent delays or rejection by the agency. By following these guidelines, organizations can ensure their clinical investigations are compliant with MHRA expectations, thereby facilitating the approval process for new medical innovations. This guidance ensures transparency in the regulatory process and sets clear expectations for the quality of information required to protect trial participants.

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## Content

This guidance will help manufacturers to submit the correct information when applying for approval for a clinical investigation. It includes the documentation you must include for all applications and what additional information we need in certain circumstances.

## Attachments

- [Submitting a clinical investigation proposal for MHRA assessment](/government/publications/clinical-investigations-compiling-a-submission/submitting-a-clinical-investigation-proposal-for-mhra-assessment)