Under-fire Lee Mason and John Brooks were among the Premier League's officials who sat through a video workshop led by PGMOL chief Howard Webb on Tuesday to ensure there is no repeat of the weekend's errors.
The emergency meeting at Stockley Park, as revealed by Sportsmail on Sunday, focused on reviewing the mistakes made by Mason and Brooks.
Officials watched back video footage of the incidents from Arsenal and Brighton's 1-1 draws with Brentford and Crystal Palace respectively and discussed each in detail, according to sources.
VAR Mason had failed to check whether Christian Norgaard was offside in the build-up to Brentford's equaliser, scored by Ivan Toney.