I agree with pleno here. If this guy had 2pair or a set he'd definitely bet less than 210. With a straight as well I'd expect a smaller bet, 140ish.
Although we would bet big for the reasons lil dave gives, villain is not on that level and isnt a pro.
I know I'm late to this thread, and also not a sicko like everyone else; can confirm I said I would call in a pre-pha discussion with Alex.
Given my history with Sunny, both dealing to and playing with, I'm certain he doesn't bet this amount on the river with a hand he is confident about (ie a flush/straight). Raising the river is probably not bad given villain's high% sigh-call statistic, but I'm a pussy so I just snap call. When villain bets £125 on the river, that's when we think about folding.