The Health and Safety Inquiries (Procedure) Regulations 1975
Section 14 of the Health and Safety at Work etc. Act 1974 gives power to the Health and Safety Commission, with the consent of the Secretary of State, to direct an inquiry to be held into any accident, occurrence, situation or other matter whatsoever which the Commission thinks it necessary or expedient to investigate for any of the general purposes of Part I of that Act or with a view to the making of regulations for those purposes.