I must admit this thread has me wandering whether she was even insured at all. Will try and work out later on if she is, there doesn't seem to be a specific way to find out online, but the .gov site
@Slick posted can be used to check if a vehicle is taxed and iirc you can't tax an uninsured vehicle anymore.
If she isn't insured, I will get some money off them to cover my costs and then report to police.
If she is insured, after reading all over your posts I'm leaning towards going through her insurance even if my back turns out fine, will just need to work out a way to get the wife's bike up and running again (can't believe one of the only times I've ever borrowed her bike, I've broken it so badly!) in the mean time. What sort of time frame do these things take (assuming there's just property claim and not injury) to resolve with the insurers?
Will also spend some time this evening going through the crash advice thread.