Steven McLean has come under heavy fire for deciding to award a red card to St Mirren defender Richard Taylor as 'insult to injury'.
Celtic were unanimous in their victory against the Buddies but struggled to get out of second gear in the first half. A late flurry of goals off the bench saw Hyeon-gyu Oh strike first before Reo Hatate netted a deadly double and Matt O'Riley got in on the act to sink Stephen Robinson's men and allow the home side to book their place in the Scottish Cup quarter-final.
VAR was involved once again when Liel Abada's powerful shot was blocked by the hand of the Buddies defender, and after consulting with the monitor, McLean awarded a penalty to the Hoops and Taylor saw red. At the other end Mark O'Hara slotted a consolation penalty past Joe Hart after Carl Starfelt tripped Greg Kiltie.
