Thanks Both, no I have removed the LP522 completely from the circuit - I just reconnected the wires into the Next 3rd gen Heat Link, and of course connected 2 and 5 into the Live as well.
What's really strange is the manual button on the heat link works and makes the CH work (the radiators...
I decided to get a Nest 3rd Gen (Learning Thermostat) after reading the forums on here. I'm in a rental property with no thermostat and I want to save money on heating, and I figured I could probably take this with me if I move (I also like tech).
I read this forum...