Well done Sam!!
I'm thinking of trying this with Alfie, he never asks for it if there isn't one around and is fine without one so i know he can do it during the day.
I've noticed someimes that when i go and check on him when he's asleep that his dummy is on the other side of the room so he must have thrown it when before he goes off (he does it when he wakes up, throws everything out of his cot) and then gone to sleep without it anyway x