We bath him with his big sister, then put him in pjs and sleeping bag and feed him in a darkened room (the room that he sleeps him). Sometimes feed to sleep and sometimes place him down drowsy, when he seems happy to put himself to sleep. Asleep by 8ish, then will sleep till 11 or 12. All fine, but then goes to pot from midnight onwards, waking every hour or so. I usually feed him back to sleep, only for him to wake up again as soon as placed down in co-sleeper.
He does seem to sleep a lot in the day (compared to his sister, anyway), and i wondered if this might be the culprit? e.g., today up at 5.30, down for a nap around 9am, then either napping or feeding until 3pm. playtime from 3 pm through to bedtime. I'm wondering if i need to force a proper block of waking time around midday?