HSE doesn't insure them. If it complies to HSE then fine, but, and how many times do I need to say this, its up to the insurance company at the end of the day.
I didn’t say HSE are the insurer, I said a statutory inspection (which will be completed by an insurer - Zurich, Allianz, BES etc) won’t fail just because non original parts have been used.
HSE guidance allows for use of non original parts and there’s no reason why such use would result in a fail under statutory inspection.