OK i'm a fool. I bought the dual system after reading that it would work the same, but would be more future proof should I want to move property and take it with me. I'm assuming I need to use 4 instead of 3, but what about Common ?. There is no common with mine ?
I bought a HIVE installation kit, and have spent several hours today trying to work out how the wiring should go within the receiver. The closest I found was here:
https://www.diynot.com/diy/threads/horstmann-to-hive-wiring-check-please.476261/
but it's not completely the same.
I have a room...