“Had the FA followed the advice of Headway and other leading experts by introducing temporary substitutes, as successfully used in other sports, Diop would not have been at risk of exacerbating the injury to his brain during the seven minutes he was allowed to play on before half time.
“Instead, he could have had a longer assessment, which would have included the 15-minutes of half time, in a quiet treatment room. This would have given the medical team more time to make their decision.
“The new protocol has failed its very first test. Fifa and IFAB must act now to alter the rule and introduce temporary concussion substitutes to avoid such unacceptable risk being taken in the future.”