The video assistant referee (VAR) system is already used in Germany's Bundesliga, Italy's Serie A and other competitions around the world this season, to mixed receptions. It was used in last summer's Confederations Cup and in England's friendlies against France and Germany. But it has not yet joined goalline technology in the Premier League. It is still being trialled in English football. Leicester v Fleetwood was the third time the VAR has been used this month, after Brighton v Crystal Palace in the FA Cup and Chelsea v Arsenal in the Carabao Cup. VAR can only be used for goals, penalties, straight red cards and mistaken identity. It can only be implemented for a clear and obvious error - not if the referee decides he wants another check. He has the choice of reversing, or sticking with, his initial decision based on the video referee's opinion - or he can view it himself on a screen next to the pitch. Source:BBC