Replace Heatmiser gen 1 with Tado smart thermostats

Hi, appreciate some help. I have two heating zones, downstairs + hot water and upstairs. I have two 12v thermostats connected to a Heatmiser UH1 wiring centre. Can i connect a wireless receiver to zone 1 of the UH1 wiring centre to control heating and hot water (tado wired thermostat does not have hot water control). The receiver would be powered by a separate spur. I would then connect a wired tado stat to zone 2.

UH1 wiring diagram on page 2