I may be talking out my 'arris but with a programmable room thermostat, surely there’s only two wires (the ones that go to the original room stat) to connect? Something like this:but its wired, I'd be scared shietless to deal with electrics as a layman.
https://www.tlc-direct.co.uk/Produc...wVCg4DM0g2NTYmoGfm4_K3lGs1uyrAtcaAmBJEALw_wcB