The Premier League's referee chief Howard Webb has contacted Arsenal and Brighton to 'acknowledge significant errors in the VAR process' after two controversial offside decisions on Saturday.
Arsenal and Brighton were both left aggrieved following two controversial decisions, with Brentford's equaliser at the Emirates wrongly allowed to stand and Pervis Estupinan's opener at Crystal Palace incorrectly chalked off.
Sportsmail revealed after Arsenal's 1-1 draw that Lee Mason, on VAR for their game, had forgotten to put the lines down to adjudge whether or not Christian Norgaard was in an offside position when he crossed for Ivan Toney.