That really takes the biscuit ! Celtic 's Leigh Griffiths invoked the power of the Tunnock 's Tea Cake in his warm-up routine for Good Friday night 's game with St Mirren . The controversial striker warily looked round in the dug-out before unwrapping the tasty treat within the first 10 minutes of the vital SPL encounter . His manager , Ronnie Deila has encouraged the concept of the 24/7 athlete by insisting on a strict diet regime for his players . Celtic striker Leigh Griffiths was caught on camera enjoying a biscuit during their match at St Mirren . Griffiths was caught in the act on the substitutes bench during the opening 10 minutes of the match . But he would n't have been impressed when Griffiths was caught tucking into the biscuit on live TV . Needless to say the Scotland star remained firmly on the bench throughout the Premiership leaders ' 2-0 win in Paisley . The commentator on BT Sport asked : 'Are you allowed to do that on the bench ? – I 'm not sure . Part of a footballer 's healthy diet . ' Griffiths has always something in reserve . Next time , maybe it will be a Caramel Wafer . Despite not starting for the Bhoys , Griffiths looks content as he tucks into the biscuit on Good Friday .
Celtic beat St Mirren 2-0 in their Scottish Premiership clash on Good Friday . Leigh Griffiths was named among the Celtic substitutes for the match . Striker was caught eating a biscuit during Friday night 's of the match .