Celtic v Rangers: Old Firm 'the biggest derby in the world'

Former Celtic midfielder Si Ferry and ex-Rangers player Andy Halliday chat to Connie McLaughlin about why they think the Old Firm match is "the biggest derby in the world".

Celtic v Rangers: Old Firm 'the biggest derby in the world'
Former Celtic midfielder Si Ferry and ex-Rangers player Andy Halliday chat to Connie McLaughlin about why they think the Old Firm match is "the biggest derby in the world".