I don't follow. My quote in italics is below that in the link, and specifically refers to cases where there is damage only to property, I.e. The bike.
As far as we are aware, the driver has not provided insurance details. Phone number and reg available only. There is no personal injury so there is no legal obligation to involve the police, IF the driver stumps up insurance details. Now if he refuses, the OP could go to the police, although they may not do anything
If a driver involved in a traffic accident refuses to give details, such as name and address, at the scene of the accident, this information can be obtained in other ways. If the registration number of the vehicle has been noted and the accident has been reported, the police can trace the owner (not necessarily the driver) of the vehicle and their insurance company. However, the police can refuse to pass on this information.