I heard the pavement was slick, that the bike slid out from under him.
I imagine that the bike and he went sideways, falling onto the Scot policeman at his side.
No one's fault.
Well, if that was true, he was riding too fast for road conditions. I think it is an amusing coincidence that the same thing happened at the Tour de France today. (I don't think anyone was seriously hurt there, either).
Our W is a competitive guy.