ok-- an idea --
couldn't you but a 12V rechargeable (or non-rechargeable, or 5V) battery in a wall box behind the thermostat? ok you may have to cut a hole in the wall, and you may have to use the white panel behind the Nest to cover that over, but there would be no chasing (until you next...
I have used laminate flooring in my kitchen twice - and several other rooms - fitted by me.
if the room is north facing, in a coldish house - like my 1930's house, there is very little expansion. However, do leave a small gap.
the real problem with installing in a kitchen is spills. if you...
where is your current thermostat? isn't it an option to just swap it out with the new one?
if not, can you be creative? use the white back panel and have it up against a door frame, then run the thin USB wire down the edge of the door frame?
just an idea...
nothing's truly wireless, is it.
i had mains wires and heat switching wires for the old stat already in the wall, so re-used them for a 12V supply
re the white plate... I will remove that eventually, but will need to patch and paint the wall first
just to follow up.... all fitted quite easily over the weekend - including replacing the old thermostat with the NEST one, using the existing wiring to run 12V to it from the Heat Link, that I mounted next to the junction box in the airing cupboard
I have the same thermostat and, I'm pretty sure, a Y-plan system.
Whilst I think (so far - still researching it) that swapping out the wall mounted thermostat should be the easy option, I'd rather put the Nest controller where the current thermostat is.
So, my thoughts are to buy a 0.5m...