That is why I said "
What about it (Part P),
anyway?", and "
When you return would you please tell us what you think Part P says about replacing cooker control units?", and why user56565 wrote "
part p wouldn't affect this job".
What you have quoted is wrong. That is not what the law says, and I'm staggered that you think it is. These people have a vested interest in promoting the use of electricians, as that will generate more training revenue for them, so they have put lies on their website to make the requirements of Part P appear far more restrictive than they are. That quote contains 3 sentences, and 2 of them are wrong.
Finally,
you said:
there are a few people on this site (maybe 1 in particular) & every time breath is drawn, out comes Part P..
I think most people, when giving advice, mention Part P, for one very simple reason - they do not believe that general awareness of its existence is widespread enough yet for it to be safe to assume that people know, or should know, of it. And even when people think they know what it says, they are sometimes wrong, as you have just amply demonstrated.
It's not a case of refusing to advise people, saying "nah-nah-na-nah-nah Part P", it's that anybody who is acting responsibly feels that it would not be right to allow someone to go off and break the law out of ignorance.
And I can recall at least one instance of someone asking how to do something that was notifiable, getting the technical advice and a "by the way do you know about Part P?", who
hadn't known about it
and who after investigating it had decided to use a registered electrician. Not for technical reasons, but because they wanted to remain within the law.
If you find it tiresome - tough.