Dangerous Occurrence

An adverse reportable incident as defined by RIDDOR, as being an “occurrence which arises out of or in connection with work and is of a class specified in—
(a) Part 1 of Schedule 2;
(b) Part 2 of Schedule 2 and takes place anywhere except an offshore workplace;
(c) Part 3 of Schedule 2 and takes place at a mine;
(d) Part 4 of Schedule 2 and takes place at a quarry;
(e) Part 5 of Schedule 2 and takes place where a relevant transport system is operated; or
(f) Part 6 of Schedule 2 and takes place at an offshore workplace;”.

These can be grouped into three kinds of reportable dangerous occurrence:
1. General, which are incidents occurring at any workplace;
2. Incidents occurring at any place other than an offshore workplace;
3. Incidents occurring at specific types of workplace. (https://www.hse.gov.uk/riddor/dangerous-occurences.htm)