1. better contact the police first. number to call is 999

2. if it is a minor one and you can move both of your car, better park it, so to ease the traffic flow. if the police advised you to go the the nearest traffic department, take note of the plate no. of the other car and the mobile no. of the other party.

3. once you have the police report, the police will advise you if you will have to go to the other party's insurance (other party's fault) or to your insurance (if it's your fault).