All I could find was the broad scope of water conservation and ventilation respectively.
The first has nothing to do with safety under any warped way of looking at it. The second really is only safety related in the event of gas burning appliances that source air from indoors. Unless you delight in a house so airtight you could suffocate, in which case...
I think, that as stupid/evil as the government may be thought to be, most of this crap is directly resulting from falling in with the EU. Thatcher (as much as I didn't like her policies on the whole) would have at least told them to stuff it up their derrierres.
TB, President of the UK and former rotating President of the Solar System was too keen to be the man of Europe and caved in to all this pointless crap.
Part P is, IIRRC, traceable to a specific EU directive. Part L and G almost certainly. HiP too (they *want* that energy cert on every dwelling, the rest is a smokescreen).
The icing on the cake. None of the sole traders I have any contact with will ever employ anyone. The bloke over the road from me does a lot of small business accounts in the village, and he openly advises many of the one-man bands not to take on a mate as it's more trouble than it's worth in his opinion, with regard to costs and paperwork.
Absolutely agree. Too sensible though.
Tim