Thanks for the feedback Eric.
I ended up with the wiring as below.
Connected the wiser hub via app. Main issue is HW fires up the oil boiler (showing hot water light green on hubR) but heating doesn't come on when heating light green on hubR.
Hot water light on - boiler fires up
Heating light...
Upgrading from Horstmann 425 Diadem (no thermostat connected) on an oil boiler (Myson) to Drayton Wiser kit 2.
I'm just trying to confirm exact wire placement for the new plate. There are a few loops from the old system which I suspect are done internally/switching system with the wiser 2...