Six incorrect interventions have been made this season by video assistant referees in the premier league.
All top-flight games have been reviewed by an independent panel this season.
The panel went through hundreds of incidents and identified 48 situations when the VAR needed to be used, with 42 correct decisions.
Six incidents were missed completely and on another six occasions, VAR overturned on-field decisions that had originally been correct.
It is not known what the individual decisions were but the new chief referee is determined to improve standards.
The time he spent in MLS, where VAR has been in use since the beginning of the year, made him an advocate of the system.
He knows that its implementation in the English game has not been smooth.
A new VAR coach, Phil Bentham, who has a background in rugby league, has been appointed and he is going to visit all top-flight clubs and some in the Football League early in the new year.
There is controversy surrounding the use of substitute concussions in the premier league.
At the end of October, the Professional Footballers Association renewed its call for temporary subs to be allowed, after a goalkeeper took a blow to the head in a game.
The World Leagues Forum has written to the game's rule-making body Ifab to say that the league is willing to use temporary subs.
There has been no change in Ifab's belief that temporary substitution could cause more problems by rushing concussion assessments, so the request may be rejected.
Any player suspected of having a concussion should be replaced.
The weekend of 1 and 2 January will be treated as working days for player registration by the league.
Signing players can be registered as soon as the January transfer window opens in time for the 19th match of the season.
It's significant for Wolves as it could allow Matheus Cunha to play in the derby at Villa on January 4 if his loan move from Atleti Madrid is completed on time.
The average time of a game in the premier league has increased by 38 seconds this season as referees are more proactive in dealing with time-wasting
While that initiative will continue, league officials are not expecting to see matches get extended to the same levels as some games did at the World Cup, when matches lasted more than 100 minutes.
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