Video Assistant Referee causes controversy every week in the Premier League , but how are decisions made, and are they correct?

After each weekend we take a look at the major incidents, to examine and explain the process both in terms of VAR protocol and the Laws of the Game.

In this week's VAR Review: How Arsenal 's penalty against Newcastle United was overturned. Why Brentford 's Nathan Collins escaped a red card against Manchester United . Plus, should Liverpool 's goal against Crystal Palace have been ruled out for a Mohamed Salah handball, and were Brighton & Hove Albion wrongly denied a penalty at Chelsea ?

Newcastle 1-2 Arsenal

Possible penalty overturn: Pope challenge on Gyökeres

What happened: Viktor Gyökeres broke through the centre in the 15th minu

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