Hi squowse,
When I got the quote for the hardwood door I did request if it was possible to install a multipoint lock (similar to uPVC) in a hardwood door but was told that the door needs to match the frame. The only method of doing this was to use a prehung door i.e. frame and door
That's rubbish. They fit no problem - hang the door as normal, then you just router and chisel the slot out and fit the mechanism.
The only issue is the limited choice in lever handles for wooden doors and euro cylinders