If I was Bilic, I’d just take the players off and say “Sorry ref, we can’t compete if he’s scoring a volley into the top corner.”
Just in terms of how our player movement and very narrow overall play causes things to happen: I'm pretty sure that Romeu was in a position to volley that because he was half-covering the right side, because KWP was somewhere over where you'd expect Bertrand. So while Romeu's marker was switched on, no one else really expected someone flying in from that position.
Well, the roads, and the wine (and the sanitation). I'm never one to waste an(other) opportunity. You set 'em up, I'll knock 'em down
Can someone inform them that the 18 yard box is a zone that they ought to mark, jointly or individually.