250 notes sounds like the excess you pay if you make a claim. Did the insurance company tell you that?
As far as I know, your company will just chase her company to get it sorted! So you might be a while waiting but it shouldn't affect your no claims, though I'm open to correction on that! Fortunately I've never had to go down that road so I'm only goin on what I've been told.
Best of luck,
Rob