so there are 3 things in the pics and its the 3rd one:
1) The receiver - which is connected to the boiler and has light on (part of
Binding the Y6630D Wireless Room Thermostat - Honeywell UK Heating Controls)
2) the wireless thermostats- which has the cover lifted off in the first pic. this also came with the link above, y6630D, but is broken.
So i get how those 2 work, if they worked!
3) then i have this, which need to be wired into mains somewhere it sounds, cant take a battery. if the wireless one above in (2) is working would i even need 3? seems a pain to find somewhere to wire in that has electric in wall anyway?
https://www.NoLinkingToThis/p/honeywell-t6360b-1036-room-thermostat/26159