Given that I spend a third of each day sleeping, it's important to try and keep those hours as steady and within range as possible, but it is a very difficult thing to achieve. QUOTE]
Actually, few adults spend a third of their life in bed (8/24), let alone asleep - I'd venture to suggest that those who live alone spend the same amount of time sleeping as those who share beds with others, but spend less time in bed. So, not so many unconconscious hours to worry about as you first think.
It's a very difficult balance for others, between allowing people with diabetes to sleep as long as they want and checking that they haven't gone hypoglycaemia, which is probably most likely to happen approaching dawm - if you're not hypo, then the last thing you want is an alarm or text waking you up.
Personally, I check my blood glucose levels before bed, eat if they're lower than I want. If I wake in the night for any reason, I consciously think "Am I hypo?" and if I think I am, have a handful of jelly sweets, rather than trying to test in the dark (so as not to disturb partner) or sometimes, if I need a wee, take test kit with me to loo, so I can put on light.