Thanks RandomGrinch much appreciated. That's what I'm going to use as have been doing further research...fingers crossed it works as have read that some baxi boilers don't play nice on OT with Nest systems.
Hi all, im a going to replace my PROCOMBI CT Plug in Wireless 24HR DIAL Thermostat with a nest 3rd Gen Thermostat. But I'm a bit confused to how best to do this. The image attached is how the old receiver is wired at the min. Can someone advise if they had done one of these before and the best...