Sorry I didn't explain properly the black and grey are on the tado loom (not pictured) I'm thinking these just go in where the blue and brown are on the M5 block. As that's where my existing thermostat is wired
First time poster so please be gentle.
Just trying to wire in a tado reciever to my boiler but it's not on their list of boilers for wiring diagram etc .
Anyone know which heating control wires I need to remove/replace? I know the live and earth side for the power supply
On the first pic...