Thanks for all your responses.

Muppity, I would say that I'm 99.9% sure that it's not a separation issue. He's always been like this. If he happens to wake up then that's it, he's awake. DH is the same - but will not bother me (well, unless I'm willing to be bothered) and will either go and watch telly or get something to eat. So I guess it's genetics. We are just going to "train" him to stay in his room unless of course he genuinely is hungry, upset or unwell. Most times when he comes into our room I offer him a drink of water and then he goes off back to bed.

MumtoA, the baby gate is a great idea except well, my mum bought us one when he was starting to walk. I think it took him half an hour to work it out and all it did was hinder us in trying to catch the baby! I told my mother it was a waste of money.... I like the idea of the video monitor in the room though. Maybe I should invest in one. That way I can check on what he's up to. Do they have night vision ones? I leave
a couple of wooden puzzles and books in his bedside cupboard. They are never left out but he knows where they are. We often find him sprawled on his bed out to it with a puzzle under his arm and books scattered everywhere.

Marydean, we leave the lights off at night. Just the glow from a moon as there - no street lights - as we are in a rural location. He does have a bedside lamp with a very low wattage. I would prefer to leave it in his room so he can turn it on if he needs to.

Artechim, I'll keep the dvd thing in mind. DS1 learnt how to put a video on at a very young age....It was a rare morning that I didn't wake up to the sounds of "can you feel the love tonight" by Elton John in the Lion King.