regard in another of course the times they are changing. the imminence deployment of video as there's calls perhaps above all for an equally radical shift . at any rate the mood of the referees camp is overwhelming. it won't be long before everyone accepts it as a useful resource the referee on the pitch and the teams involved i think it's going to be a success. i don't. think you know the all the training course before the under twenty world cup demonstrated that everything we tested practiced and learned here beforehand was a really good foundation also for the referees who haven't had any previous experience with it. to make a clear decision. often in the space of a fraction of a second. in the thick of a highly emotional atmosphere. you don't.