Coronation Street's missing baby

I'm a little concerned about little Liam.  Where the devil has he gone?  Is Uncle Kirk being babysitter, all the time, while Maria's at work in her new job at Underworld?  Is Maria so ditzy that's she plum forgotten all about her baby boy?

Or maybe Ozzy's gone stir crazy with Maria and Kirk in the flat above the salon and eaten little Liam alive?