So, what does RIDDOR mean? Firstly, RIDDOR stands for Reporting of Injuries, Diseases and Dangerous Occurrences Regulations. This means, the employer or person in charge of a workplace is responsible for logging RIDDOR if an incident occurs. Reports should be logged as soon as possible, but they have to be logged in ten days. If you are an employee and witness an incident, you must report it to a superior member of staff in order for it to be reported as a RIDDOR incident.
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https://www.theccm.co.uk/riddor/