@Jon Not sure if you've seen this or not..
Looks a good price for smart radiator valves.
V3P-4SRT01V-TC-ML | tado° Smart Radiator Valves | Four Pack | ao.com
Make sure you’ve got the perfect temperature at all times with this V3P-4SRT01V-TC-ML four pack of tado° smart radiator valves, with built-in temperature sensors.
ao.com
Looks a good price for smart radiator valves.