A friend of mine has a problem with her ds1. For the last year he has been waking at 5ish and then going all day. He has always been very active but he does get very tired and grumpy and does need more sleep, just refuses to. Putting him back to bed and telling him that it is not time to get up is the start of a game. They now have a 10 week old ds2 and are severely short of sleep.
My friend thought it was a phase at first then it would be solved by putting him in a bed, then it would be solved once he started nursery. Nothing seems to be helping and she welcomes any advice.