Adding smart thermostat

Em85_

Had tado for around 2 years, had an extension built and want to add another smart thermostat into the other room. We currently have the wireless thermostat in the living room and wanted the same for the extension but can only find the wired version which obviously will be no good. Thanks in advance

Em85_

We have for two radiators in the room but I don’t think they are on a separate heating circuit to the rest of the house so an additional thermostat probably isn’t the answer.

I wanted to be able to heat this room to a Desired temp as it’s a lot larger than our current room where the smart thermostat is. So although the living room has gotten to the right temp the extension is often abit colder.

Would a the wireless temp Sensor work to kick the heating in when goes below a certain temp in the extension? Or does it only work with the radiator valves

Thanks