Thanks for everyone's replies. I hope I didn't sound like I was whinging I just wanted to see if I could make the most of the fact that he does have a big block of sleep and try and persuade him to go to bed a little later.

I have tried today to keep him up and feed him more often, I was demand feeding but he was pretty much going straight back to sleep after every feed in the day and wasn't awake for very long. Today has been good have been giving him a bottle every 3 hrs and hopefully tonight he may be a bit fuller at his last feed and a bit more tired and fall asleep a little later?? See what happens.

I am truly lucky that he is sleeping for long stretches, I was just hoping like Rufalina said that some sort of schedule would help him get used to night and day but obviously I will learn from him as we go.