Hello.
I have wired an S plan plus system. 1 zone for DHW, 1 zone for CH and 1 zone for UFH (underfloor heating).
3 channel programmer, 3 motorised valves, cylinder stat, room stat for UFH, no stat for CH & 2 pumps.
Honeywell motorised valves, Horstmann 3 channel programmer, Grundfos pumps...