you don't appear to understand.
the 'stat is suitable for both, the boiler instruction will explain whether it should be wired for 240v or not, although the wording may not make it obvious to all.
Lol yep I'm stuck hehehe
OK looked through the manual and found this:-
The appliance may be used with any certified mains voltage room thermostat as described is section 4.
Section 4 details are :-
If a room thermostat is to be used, remove the link between terminals 1 and 2 and connect the switching conductors in place. If the room thermostat requires a neutral supply, connect this to the N terminal.
So the Drayton Digistat 3 only had two wires connected to 1 and 2 on the combi obviously with the link removed on the combi.