Er..... Well, guys..... I didn't realise I was to become the broker of World War 3 - and me a pacifist!
So, as I stand here tin helmet duly adorned and gas mask (kite marked of course!) in hand, all I can (dare!) say is thank you for the direction
Elrobbo32: what do you mean by "derate the cable" I was going to use the existing cable because this would be a shorter run, the cable was only laid 3yrs ago and is the thicker 1.5mm lighting cable
I have to think about re-routing the cable from the CU to the loft for the upstairs lighting circuit as currently the cable comes down through the one place I wish to put a door downstairs.
rather than chisel away up through the two floors to relay the cable, my preferred (easiest) route...