Please report dangerous drivers to the police - Roadsafe. Report to plod, not just whinge here.

I don't think it is 48 hours. Police on the scene told me it was 24, which I certainly don't believe. I think it all ends up filed under "i" for ignore anyway.

Has to be reported within 14 days or there's a reasonable defense of "I don't remember that event". If it's a collision then that doesn't apply as it's fair to assume a driver would remember hitting something.