So you didn't even understand what work is notifiable, just an insignificant error than...
Well maybe you should listen to someone who does?, or read the documentation available to tell you?, it's very clear that if a single supply from the DNO (one cable, get it?) goes to domestic premises then all other premises fed from that single supply in any way (except a business or lift) are covered.
Oh god, here we go, you know better than the government, now didn't I just know this was coming !. What's the point in debating with someone who thinks he understands the law better than the government, sigh.
Greg