Zone Valve Wiring - S Plan Heating System

[stub101]

Looking for a bit of help with wiring for zone valves within my S Plan heating system.

System consists of the following:

Zone valve 1: downstairs underfloor heating - 6 port manifold (wired Tado thermostat)
Zone valve 2: upstairs heating radiators - (wireless Tado thermostat via extension kit)
Zone valve 3: upstairs bathrooms underfloor heating - 4 port manifold (wired heatmiser thermostats)
Zone valve 4: hot water

My question is around Zone Valve 3 and I'm basically looking for a way to wire the system so that the upstairs bathrooms underfloor heating is activated at the same time as the upstairs heating radiators.

Zone 3 hasn't been working due to a seized UFH pump but this is being replaced and I dont want to bother with setting any fancy schedules for the upstairs bathrooms - they just need to come on whenever the upstairs heating is on.

Is there an easy way of wiring zone valve 3 to 2? Is it as simple as wiring both 'call for heats' together in the wiring centre?
I will be disconnecting the zone actuators for the upstairs bathrooms underfloor heating so all 3 ports will come on together.

Any help greatly appreciated please.