The referee for Leeds United’s Championship play-off final against Southampton on Sunday has been confirmed. The Whites booked their place at Wembley last Thursday with an emphatic 4-0 victory over Norwich City at Elland Road, having actually drawn the first leg 0-0. Southampton, meanwhile, were comfortable 3-1 winners over West Bromwich Albion 24 hours after Leeds’ win. They were also held to a 0-0 draw in the first leg. OPTA’s supercomputer had Leeds and Southampton as the favourites to reach the final before a ball had been kicked, with the two sides’ coming third and fourth respectively in…