ITV bosses have lined up a stellar replacement for Ally McCoist on I’m a Celebrity… Get Me Out of Here , after the football star got cold feet about taking part for the third time. Irish boxing legend and Mirror sports columnist Barry McGuigan will now be heading Down Under. His decision to join this year’s line-up comes amid the annual last-minute frenzy as some of the celebs either sign on the dotted line - or ship out. One source said: “Barry is a bona-fide sporting legend and he’s a great