I finally remembered to come back on to this thread just to make sure I wasn't alone with my insomnia! I fell asleep in front of the TV for about an hour and a half around 10pm and since then have dozed for half an hour twice. I've given up now - come 11am I'll be able to sleep for England. 
I have a new meter being fitted this morning and a boiler service late this afternoon, hoping to be able to grab an hour between the two.
Book Title by Their Authors (Parlour Game)
. 