This morning at four (yes, FOUR) thirty, boycat started scratching at the bedroom door. Normally this isn't a problem, but he's recently learned that he can open the door by jumping up onto the handle, so after dozing back off, I then got woken up by a large ginger lump jumping on my head and settling there 
We live in an open-plan flat so there's no way I can shut them into the kitchen overnight or anything either!