So my understanding that extending, say a final ring main or a lighting circuit, from the house to the Conservatory does not need notifying is correct.
Thanks for clarifying that.
correct, but that's not what you said..
if for example you were installing a new circuit back to the CU then it's notifiable, or if you were installing a small CU in the conservatory, then it's notifiable etc..
in as much as whatever is notifiable for the rest of the house is notifiable in the conservatory.