Food for thought here, appreciate the inputs.
I have just been using a metal/cable scanner on the walls and using that with my memory of some wires when the edge of floorboards were up before carpet etc, trying to draw a picture of the ring how it is today but unfortunately, I lose the wire at the end of the kitchen! It goes up the wall and simply stops! Unless it's floorboards up and potentially even part of the kitchen ceiling coming down, I don't think this ring can be traced effectively. When they did the kitchen extension they clearly extended the ring circuit but, lord knows how and where!
Not sure what to do now. ie, the original idea seems easiest but obviously getting the hint from here it shouldn't be done like that. The original sparky advised he was going to do it like I originally diagramed but I am using a different guy now and was hoping to make life easy by prepping the wires so he can just connect up.
Hurting my head abit with what to do for the best.