Basically, riddor stand for Reporting of Injuries, Diseases, and Dangerous Occurrences Regulations. In every construction project, there must be a person in charge who is responsible for handling the RIDDOR. And for those who are passionate about managing the RIDDOR, the College of Contract Management provides CIOB Level 3 in Site Supervisory for everyone to enroll in. https://www.theccm.co.uk/riddor/