Upvote:5
This isn't really appropriate for this site, but...
You don't need to report it to the police.
You should report it to your insurance company, giving as many of the other parties details as possible.
Why? Because all parties have several years in which to lodge a claim against you - if you report it now, your insurance company can investigate it with the other parties and come to a "no fault" closure on your account, ending the threat of claims and litigation later on.
I have seen insurance cases where there has been no damage at the scene, but one party has lodged a claim two years later for a new radiator or whatever, and because the person being claimed against failed to report the accident to their insurance company at the time it was almost impossible to fight.