I guess I was lucky. I was hit from behind (in a car, by a car) in January 2016. I never received any compensation claim calls. My insurer was Direct Line in that instance. Plus we have one of those BT "call guardian"phones that "announce" calls from unknown numbers. I assume it's been 100% efficient in weeding them out - we've never had one bother to go through the system to speak to us anyway.