Cheers folks. I've been in the place a short while, having taken over the end of a contract when I moved in. The new contract has these additions to it.
The bit about the shower is worrying because a shower engineer recently told him we have a 1.5 bar rated shower unit, but running pressure measured going into it is only 0.7 bar.
We get a useable sprinkle out of the shower, but have been told that as we get into the colder months we'll need to rely on a combination of using the 'extra power' button and turning down / up the temperature dial to ensure no freezing or scalding water comes through.
This may be a problem, and with the new clause he seems like he's trying to wash his hands of the problem.