How does it work? For subjective decisions, either the referee informs the VAR that a decision should be reviewed or the VAR identifies a “clear and obvious error” in one of the four match-changing situations and communicates this to the referee. ... The VAR reviews the broadcast footage, using as many angles as possible.

How does VAR work in football?

The role of the VAR is to assist the referee to determine whether there was an infringement that means a goal should not be awarded. As the ball has crossed the line, play is interrupted so there is no direct impact on the game.

How does VAR work in Premier League?

This season, the approach taken in last season's Champions League and this summer's Euros will be used by the Premier League. Rather than using 1mm lines to judge offside – lines that TV viewers never actually got to see – VAR will measure calls by the same kinds of lines that are shown on TV broadcasts.