I wrote another post but on reflection think it's too waffly and doesn't get to the crux, which is:
DS wakes between 3 and 5 every morning and won't go back to sleep without (and often with) extensive intervention. He goes to bed at 7pm and puts himself to sleep then and for naps. During the day, he naps for half an hour at 9.30am and for as long as he will at 12.30 (often only half an hour then, though we're trying to extend this).
How do we get him to sleep later in the morning? He used to sleep from 7-6am every night before five months - not sure what changed! All advice gratefully received!