I managed to get this setup successfully today and would like to say a massive thanks to you both.
The extra wires were for a frost stat which I need to replace now as I broke one of the components for that when investigating the wiring.
I currently have a boilermate thermal hot water store with a glow worm boiler. The control for the heating is a basic grasslin timer and I would like to replace this with the hive heating only receiver as the boilermate controls the hot water supply currently.
I have attached a picture of the...