My DS has been going to bed at 8pm for ages with generally no problems, and sleeps through till (we're so lucky) after 7am. In the last couple of weeks he's no longer settling at this time. We were at a relative's house a couple of weeks ago where we were going to stay, but we came home in th end as DS wasn't going off to sleep. That's not usual if we're away from home for the night though. But, since then, we've had problems almost every night.
His routine hasn't changed at all, apart from taking him to the park before tea as an attempt to wear him out! Last night for the first time ever, DH took him out in the car at 1am.... (it worked, though)
A tooth came through recently, so another could be on his way, but he doesn't seem in pain. we've given him calpol a couple of times but it hasn't made a difference.
He's not upset when he's up, he's hyper and very much ready to play!
Arrrggghhh..........