..and another +1 on having the services thoroughly checked – the place we bought was built / extended by a very well considered local plumber over the 35 years he was here. Consequently everything is 100% tickity-boo. My brother, on the other hand, had to do a full re-wire and re-plumb after they bought a place that’d been knocked together by a complete cowboy. I think all the survey proved was that there was a boiler / electrics in place, no testing beyond “yes, there’s radiators etc”
The people that bought our place hadn’t even considered that the heating was powered by the wood-burner. Cue some concern / questions via the estate agent after they’d moved in.
Quite how / why you’d spend such a frightening amount of money without thinking things through, I’ve no idea.