The Health and Safety Executive gives advice to the Government on health and safety matters.
The Rail Accident Investigation Brancj investigates railway accidents and incidents on the UK's railways to improve safety.
The Rail Safety and Standards Board helps the mainline railway industry's work to achieve continuous improvement in health and safety performance.
The national police force for the mainline railways and the London Underground system, Docklands Light Railway, the Glasgow Subway, the Midland Metro tram system and Croydon Tramlink.
The Railway Industry Health and Safety Advisory Committee (RIHSAC) provides advice on railway health and safety and comments on proposed new regulations and guidance.