Posted By Sean Fraser The responsibility, as far as I could see, would be yours as the employer. It is the only approach to take that would remove any ambiguity like this. The way to consider it would be this - if your employee, during the normal course or their work-related activities, was working in a privately owned non-commercial location (i.e. someone's house) and had an accident, would you still need to ask the question? The only complicating factor here would be that the training provider was also a business, but the key thing to consider is that they don't employ the injured party - you do. He who pays the piper calls the tune, I'm afraid. As for it not being investigated - I presume you did not mean by the HSE but by yourselves or the training provider. RIDDOR is a clear cut case really, but internal reporting is often a trickier issue when off premises - but for completeness, both parties (you and the trainer) should have reported it via your own in-house systems respectively, and then liased with each other with regard to investigation and actions. This is the only way to ensure it is captured by both - and not missed as one assumes the other will do it and vice versa. After all, it was your employee who was injured, to your cost, so you would need to assure yourselves that the trainer was still competent and safe enough to continue training your people in future. I don't want to sound preachy so please excuse me if that is how it comes out. I only meant to give you my opinion on the issue.

Posted By Geoff Burt I've always felt it better to have a policy of 'if in doubt report it'. It doesn't matter if both parties do report it, but it does matter if neither do.