I had this no. call me today (on three different work extensions that should not be known externally), saying they were from Injury Claim Helpline (no such business exists), and then from "Accident Services." I caught them out as they couldn't state when I'd had my 'car accident.' Plus I recognised the voice on the third call, and pointed out his sudden business name change from the previous call - he hung up!

The other give away was the silent pause at the beginning of the call when I answered, as it was auto dialled, before someone took the call and started talking.