On the odds, there is a category for who will be eliminated this week. Everyone, apart from Layton, has odds. Though Ellie, Nigel, and Bobby are all at 100/1 - effectively not going to happen but possible - if they were in a dance off with Layton. It's not seen as possible that the judges wouldn't save him up against anyone.
But he's the 5th favourite to win overall because the best there is that given that it's his job, he won't have the public vote in the end.