scuwp: You only have to report crashes to Police where there has been a injury or where there has been damage to property and you cannot find the owner.
Breach or not of licence conditions is irrelevant to the circumstances. The following car is obligated to stop within the length of lane visible on a marked road (so stop short of the vehicle in front) or within 1/2 the visible distance on an unlaned road. It doesn't matter why the car in front stopped.
Don't hand over a cent, it's not your daughters fault at all. 100% on the following car.
IANAL, but usually insurance companies will also require it is reported to the police if there is any form of damage. If I was in this situation, I think I would report it to the police, just so it is on record, incase insurance companies get involved.