"The liquid was thrown from a bottle and the 28-year-old initially thought it was water but quickly realised what it was from the taste." He's clearly more experienced in that area than I. I'm not sure I could identify piss just from the taste, what with having never tasted it before.
Also "It is not known whether the Manxman was targeted." It was the time trial. The cyclists ride alone. If the piss was intended for another rider, the bloke's aim is really off. He didn't miss him by yards, he missed him by minutes.