Is HSE the right organisation to contact? - a guide to HSE's responsibilities and contact details for other government organisations who might be able to help you.
The type of circumstances where HSE may need to respond out of hours are:
If your incident fits these descriptions ring the duty officer on 0151 922 9235.
If you wish to report diseases, dangerous occurrences or work-related accidents resulting in work-related injury other than that mentioned above, the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 1995 (RIDDOR) site provides more information.