We had a built-in garage converted to a kitchen about 10 years ago, and all its electrics are connected to a new (at the time) fully RCD consumer unit. [The rest of the house is still on the old non-RCD CU].
All the major kitchen appliances - oven, microwave, ceramic hob, induction hob - each have their own dedicated radial circuit. The ring main is relatively lightly loaded - hand-held appliances, dishwasher, warming drawer, fridge, extractor fan - and little else.
We're about to have our en-suite bathroom refurbished. It is directly over one end of the kitchen, whose (RCD-protected) ring main cabling is accessible under the floor boards.
Is there any reason why we can't break into and extend the ring (Wagos or whatever) and use it to power everything in the en-suite - body drier (possibly, <3kW), extractor fan, heated towel rail, illuminated mirror, LED downlights (via a fused spur)?
The electrician employed by the contractor doing the bathroom wants to run a new lighting circuit and a new power circuit all the way from the CU - which would be massively expensive and massively disruptive compared with what I would like to do. He seems worried about covering his arse. Does he *really* need to do that?
[There will also be a pumped shower, but the pump will be near the airing cupboard and a long way from the en-suite, and will be powered separately].