Bathroom Underfloor Heating

Hi There,

The last zone in the house is getting the tado treatment. This is a downstairs bathroom with wet UFH. The thermostat is outside in the corridor.

Obviously, a wired 'stat is going to measure the temperature of the corridor and not the bathroom. If I use a sacrificial TRV, or even a wireless temp sensor, how can I force the settings to only use temps from the sensor in the bathroom and not the wired stat in the corridor?