Hello again, thanks for the advice.
I've been doing the potter around and pop in thing, but I'm pretty sure he's staying awake til he can next see me.
Tonight it was just him and I, i starting getting him to bed at 6.55, read one story and said i would only stay if he was going to sleep. He turned over and was asleep by 7.15!
So my observations are - he genuinely feels much more comfortable if I'm there, having 20 mins of (expressive, lively) reading with dh my not be calm enough.
We tried audio books before but he just wanted us back to change it/turn it off /up/down, but it's been a couple of years so I'll try again. Works for ds1.
I think I'll try the chill out time idea, thanks chandelier.
Demented - if I just leave him he comes out. I have followed everything that worked with ds 1,returning him without comment and a quick cuddle. Does not work!
Purple - problem is he really does need alot of sleep, at least 10 hours I'd say. Wakes up naturally at 6/6.30. Whatever time he goes to sleep.
Thanks all!