I've seen a great one, an Old house with a fitted kitchen, in the corner, behind the fitted kitchen is an extra 2 feet of space. At the back of this in the wall are several KMF's, and two Dbs. Old rewireables too.
The laughable thing was someone had cut a small hatch in the back of the corner unit but this just seemed to be to wind me up- even if I had 6 foot 6 inch , 22kg 14 year old with unfeasibly long arms you still couldnt reach anything , even just to switch off.
Couldn't believe just how idiotic someone could be, or failing that, spiteful?
t some pictures somewhere will post if can work out how to (not very IT literate)
Oh And another house where there was a fault (house medaevil, spelt wrong i know) and behind a kitchen cab (again you could just see through the stop cock hole, a blinking great room full of sockets clipped to wall. No access at all. All plastered over, no door.