"The argument for the continuation of the current system appears to be that permanent concussion substitutes prevent injured players from returning to the pitch and therefore is a safer system.He added:"Temporary subs would allow medics more time to assess a player in the quiet confines of a dressing room.
He also said that if a player does display symptoms having returned to play after passing an off-pitch assessment, there is nothing to stop the temporary substitution being turned into a permanent one. But when asked whether a Premier League trial could still happen next season or had been pushed further away, he said:"It's been pushed further away."The FA had been co-ordinating international efforts to get a temporary concussion trial approved and gathered the other three UK football associations for a meeting on Monday, where it is understood a majority were united in support of a protocol being trialled.
Sadly it will be abused by clubs to gain an advantage...
Football is far behind Rugby Union which is very conscious of the danger caused by head injuries and requires an HIA before a player is allowed to resume in the match