On the The Ref Show this week, Alan Biggs is joined by former referee chief Keith Hackett, and ex Sheffield Wednesday striker David Hirst, to analyse and dissect the weekend's football. A positive weekend for referees in England meant that discussion moved to the Old Firm derby where Celtic were denied a win late on against fierce rivals Rangers. But there was controversy with Celtic's Griffiths feeling he should have been awarded a penalty but referee Robert Madden turned down their appeals. There's praise in the Premier League and Football League for referees including Robert Madley, whilst in the FA Cup, racist chanting reared it's ugly head with South Korean forward Son Heung-min the subject of abuse from Millwall fans. The panel give their view on all these matters and more..