Timba, there is a lot of confusion over Part P implementation.
The only notifiable works in England are a new circuit, a new consumer unit, and any new work in a bathroom or shower room. That’s it.
Wales still has the older version, where kitchens are still notifiable, and possibly outdoors – I’ve thown my old books away so cant look it up.
Scotland is different again, and the notifiable work is different there too. Nothing used to be notifiable there, but it changed so only 2 bodies govern it, SELECT and NICEIC. It is largely ignored for all but refurbs and new builds.
I’ve no idea about N.I.
A real mess isnt it. And, deaths from electric have gone up slightly since it was implemented.