It's so predictable. I put him down for a nap in the day and he will only ever sleep for between 40-50 mins. I've just started putting him down at 7pm and keeping him in the dark for 12 hours, but he will literally sleep for a short period, after which we go in and spend about an hour (or more) getting him back to sleep for 45 mins, and then it's back to square 1.
The other night he did manage to go from 3-7am straight, but that's the only decent chunk he's had this week as far as I remember.
He will sleep for longer in a car, or maybe in the buggy but I can't always time that to co-incide and it wouldn't help at night anyway.
Any ideas how we can get him to push through this barrier?