following on from my earlier thread I just wanted to wholeheartedly recommend this book to anyone in a similar position. It's early days but it is doing wonders for my 6 yo DD1 at the moment. The strategy is simple but when you both sign up for it and the child feels involved and in control (more or less ) it really seems to work.
I've had such issues with this child and sleep in the past that I couldn't not share the info for anyone in a similar situation