I think I'm basically going to have to chose between sleeping and eating.
My digestive system is so messed up, that basically if I eat after about 5pm I don't sleep for 8+ hours. Heartburn, burping, stomach pain, needing to wee every 45 minutes or so.. so obviously, irrespective of the time I go to bed, I'm lying awake until about 4.30/5 in the morning. Which is no good when my alarm goes off at 6.30!
Tonight going to not eat anything after lunch apart from come cereal at around 5 - see if that works. I can't do another 2 weeks at work with only 2 hours sleep a night.