I just wanted to share that, after trying everything we could possibly think of to stop DS waking in the night, I finally tried a grobag, and it's done the trick! He is now 19 months, but we've been battling with the sleep issue for months and months. It's so great when something actually works! I started using it about 6 weeks ago, and he's worken once in that time when he was ill.
Having said that, he never sleeps longer than around 10 hours a night-but unbroken, which is a masssive improvement. (Any tips to get him to sleep beyond 6am gratefully received...)
I hope this might be of help to other people struggling with exhaustion...