Why did you choose not to go ahead with details for the prosecution ?

I'd suggest you re-visit that decision now. You then go through all that, you then can claim properly against the other driver.

The car tax is irrelevant in this case.

If your parked car was damaged by a vehicle that failed to stop, or subsequently report the incident, then unless you proceed with the Police accident report, you will either have to pay for any repairs yourself or make a claim with your insurers.

Reporting the incident to the other partys insureres will not result in any action, it has to be reported by the insured driver.

They are right, I am amazed you did not report it if you are not blameworthy and I am not suggesting an opinion either way, In all insurance claims where criminal negligence may apply no claim can be dealt with over a 3rd party unless it is reported to the police, make sure you get the crime reference number.

If they drove of that is an offence it itself, and if they did intend to do it legally then they would not have driven off.

Either way your insurers have to be informed which you have done so you are covered legally in that regard, the real question is for you which is cheaper, the cost of repairs or the increase in your premiums and the loss of your no claims ??

Finally, even if you report it to your insurers there is nothing to stop you from fixing it yourself or with a garage.

I was out with a drivers mate once in the truck and he showed concern that we might get pulled by the police, I said to him I dont care if we do, I am licensed with all my cpc in date etc, the veh is insured etc, and I was totally legal on the road, the point is that the only people that don't report collisions are those who have something to hide, just like those who object to police presence on the road are those who are upto no good.