Bukkie
We view during a lovely hot summer and it was only a month or so after we had moved in during October that we found out all the sealed units double glazed windows were running in water. The window cleaner informed us they had been like it for years and the units had failed a long time ago. The owner was a mad D.I.Y freak bit not very good so although everything looked nice on the surface and sailed through the survey. The most frightening thing of all though was a couple of months after moving in we had a log burner fitted. The gas engineer who removed the previous gas fire was horrified to discover Mr.D.I.Y had fitted it himself despite not being qualified and that carbon monoxide was present. I still shudder to think what might have happened if we hadn't decided to get the log burner.
Whew! re that unsafe gas fire!!!
There's no way he could have been getting that serviced yearly I would think.
I do remember in my last house that there was a gas fire in the sitting room (very effective it was too...) and I made sure I had it serviced every year. But there came a point where the gas guy said "You should have a ventilation grille for this - you havent". That was news to me - but one duly got fitted in the floor. Though nothing was said about having a carbon monoxide detector.
In my current house they didnt ask me - but just put one up on the most obvious sitting room wall - and I had to ask them to take it back off again (as I could see it clearly visible in my line of sight - ie looking ugly). So it's now on a sitting room windowcill instead.