Oooh I just found this. We are having the exact same problem. Jonah is perfectly fine when he stays with my mum but at home he's a monster. He will carry on until he gets his way and when this happens he's all smiley and happy. However we tried following what my mum did when he was at her house. The first night was a disaster and didn't work at all, but last night was a success, yippee! He went to sleep a little after 8:30 and stayed pretty much asleep until 9:15 this morning. He cried out a couple of times but we just put his dummy in and he was fine. Usually when we do this he will not let us leave the room, but last night was a wonderful. He hasn't slept for us like that for months. Here's hoping it wasn't a one off.