Thanks everyone...much appreciated support.
I have (as of this strange and surreal moment) come to realise that you are not meant to sleep in hospital. In fact the best sport seems to be to find strange, often selfish and frankly disturbing ways of keeping ones fellow patients awake.
Also, one is best off realising that hospital wards are the very proving grounds for the universe of buzzers, bells and bleeps and the volumes at which these can be sounded without causing instant and painful death. They are all doing very well at all of these things.

If we can hit that bullseye then the rest of the dominoes will fall like a house of cards... Checkmate!