In reply to FreshSlate:
Report it to the police, giving them all relevant information.
If you feel the need then buy a head cam.
Replace cyclist, with horse and rider/ pedestrian and it's evident that this is intimadation at least or the use of a car as a weapon.
If you report it, the police have powers to seize and crush the vehicle if this happens again, which is often a better action for the police force than it is to pass it to the CPS.
Whilst you haven't got a reg, you could describe the person in question and possibly give car details with regard to colour and model?