He's been in a bed for about a month in the same room as his 3yo brother. 3yo settles and goes to sleep straight away (as long as 2yo isn't bothering him) but for the past week or so my 2yo will not stay in bed and fall asleep. He was fine to begin with and I was so pleased with how he took to his bed straight away and slept really well.
I'm currently on the landing outside the bedroom door. For he past few nights I've been putting him back in bed when he gets out and leaving the room. It's constant though! I just wish I knew why he's only started this behaviour now when he was so good at first.