Was this done under professional guidance?
There are a few things that look a bit iffy.
I don't like the look of the switch for the fan directly fixed onto the wood beam and the insulation stuffed into the eaves - depending on the type of roof and required airation this could be disasterous.
If it has passed inspection, fair enough.
I also have a problem with the statement,
"Approximately 100 billion chipboard screws"
It should be at least twice this amount! :)
Just so that people know that, no matter how many boxes of screws you buy at the first estimate, it may seem a lot, but it's never enough!
The switch it for the light in the loft, not the extractor fan; that switch is the the bathroom. We had the light switch and the extractor fan (and all other electrical items) put in by a friend who is a professional electrical engineer .
The insulation was what was there when we got the house, and it passed the inspection we had done before we bought the house.
The house hasn't burnt down yet, so it seems ok.
I'm also thinking of investing in shares in the screw manufacturing industry :)