Racing Post report is curious though, don't you think? I think a thread on the Betfair Forum was pulled as well!
The jockey was arrested at the scene on suspicion of causing serious injury by dangerous driving and failing to provide specimen for analysis, and bailed while the police investigation continues. From the Racing Post.
I hope the passenger makes a speedy recovery and the jockey isn't Oisin Murphy. He's riding out of his skin at the minute.