Hi Watkins
A bit of a deviation from the thread, but never mind.
First RIDDOR reportability is nothing to do with "fault".
Many incidents are reportable (or recordable) despite happening in circumstances where everyone has done all that they should have.
RIDDOR and its predecessors e.g. Sections 80-82 of the Factories Act 1961 is predominantly an administrative measure that gives the authorities information about types of work-related incidents which can 1. then be used to help collate statistics, though sometimes 2. the information also gives regulators information to help direct regulatory "contact" either to help get Inspectors used to processes and/or consider whether enforcement action might be merited.
No 2. is rare as a tiny proportion of reported incidents end up being investigated by HSE or other enforcing authorities.
The decision of whether an incident is reportable or recordable should generally be made before anyone has any realistic idea as to whether anyone was at "fault". Determining that requires an investigation and any reportable incident should have usually been reported before it is likely that many investigations could be reasonably done to sufficient depth and decide which parties, if any, were at "fault". [This is all based on the presumption that investigations are done as they should be, often not the case!!]
When multiple reporting requirements for different work sectors were consolidated into a predecessor of RIDDOR 2014 a decision had to be made on what NOT to include within scope.
Hence, Regulation 14 of RIDDOR 2013 excludes MOST incidents involving work-related transportation from A to B, whilst at the same time bringing SOME such incidents back into scope.
The result is that for RTAs, usually (very broad terms!) these will not be within the scope of RIDDOR if they occur anywhere where the Road Traffic Act applies, i.e. on a "public road", unless as a result of loading/unloading of a vehicle or when any part of the "road" is being constructed or maintained.
The "road" includes both the carriageway, but also any verges etc AND all the utilities above and below PLUS any construction work on a building alongside the "road" is also within scope.
So, as example, HGV driver swerves off the road and collides with a house severely injuring driver or someone in the house. NOT within scope, despite this being a work-related accident.
UK national statistics when compared to most other countries should be treated with caution if trying to benchmark due to the doubts as to how many work-related transport accidents are included in any published statistics. HSE has in the past made guesses for the purposes of Eurostat and other international comparitors but the HSE guesses are often treated with much circumspection.
In contrast, if same HGV driver (or a member of the public in a private car) driving along the road is severely injured when the building alongside the road is being demolished and collapses on to the vehicle this falls within scope as would a severe injury to the demolition worker caught up in the mayhem ASSUMING that the relevant severity threshold(s) set in RIDDOR are met.