New setup with combi, rads and UFH - advice needed

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Seeking advice.

Have been a happy Tado user with a conventional heating system controlled by smart thermostat and trv’s for radiators and extension kit to add hot water control.

Now moving to a combi boiler with radiators and UFH and ideally want to use Opentherm by connecting the extension kit to the boiler to control.

However based on info from Tado looks like I am stuck with 2 choices:

1) Use Opentherm but then have to leave radiator zone valve permanently open so water still flowing around circuit when only required for UFH.

UFH controlled by Tado wired thermostats for each zone that control actuators and send boiler heat request to boiler via extension kit.

Radiators controlled by Tado TRV’s that send heat request to boiler via extension kit.

2) Use standard on/off boiler control and have radiator circuit and UFH heating with independent control.

UFH zones controlled by Tado wired thermostats that control actuators and heat request sent to boiler via valve switch.

Radiator circuit controlled by Tado wired thermostat that controls zone valve which in turn sends call to heat to boiler. Tado smart TRV’s control individual radiators and send heat request to the smart thermostat acting as zone controller.

No extension kit used.

I can’t have independent radiator circuit and UFH control and have Opentherm as the smart TRV’s can’t send a request to both the smart thermostat to get the zone valve opened and to the extension kit for heat request. The smart thermostat can’t pass on the heat request either.

Any out there with similar set up and how did you have it set up?