Hi Greenmouth,
Oh it is so horrible when you can't sleep. I seem to be able to function quite well on an average of 5 hours a night though. My problem is my OH likes to do impressions of pigs from 1am onwards. I presume your OH lives else where during the week. perhaps if he had the same pillows as at his home or is your place too light or dark at night? small things really affect my sleep he may be the same.
There is the old fail safe of smacking him over the head with a frying pan! he will definitely get a few hours then, I know I'm being silly but when my OH starts oinking at 1am that thought always makes me smile.
Seriously, you could talk to him about whether some thing specific is disturbing him or is there some thing on his mind. Nytol are quite good but I wouldn'r recommend using them all the time. Does he sleep ok when he is not with you? If so it may well be some thing environmental.
Sorry not much help, hope you find a solution
Kate x