I would imagine that an A10 built up of A10 parts an A10 engine in an A10 frame, in the eyes of an insurance company would be an A10.
I was writing in the context of modified bikes, for example running bikes with no lights on a daytime MOT. That is something the insurance companies need to know about. This morning I listened to a discussion on the BBC regarding vehicle insurance and insurance companies. The expert interviewed, who I assume knows more about this subject than most people here, stated exactly what I said below. Insurance companies can and will void a policy for the slightest reason or excuse; we have to be very careful, we have to tell them everything. We can not be at fault if we do.
If certain individuals know better or cant be bothered to write and enclose a few photos then that's up to them, it's their risk. But I hope that the point of the message was useful to the majority of members.
BTW Cyclobitch, thanks for pointing out my spelling mistake. Very kind of you.