I'm going to ask this here since I didn't want to make a new thread but I was at the game Thursday night at the Emirates. I must confess, it being Europa League and all that, I don't typically do "Thursday nights", but the other night, for the first time ever I think, I saw the fourth official actively looking like he was part of the on field officiating team. Unlike Premier League fourth officials, he wasn't just standing there, occasionally speaking with the managers, he was crouching, side stepping, bending his head in a crouching position looking at situations and trying to get a different angle. Is this a specific or new directive from Uefa or something? He really seemed like an extra assistant who was actually watching to help the referee rather than just standing there.