I own a 1970 Rover 3500 P6. Recently after asking on a forum for information on the car (over a year ago) someone privately messaged me and said they used to own the car up to 2004. They gave fitting and potentially verifiable history and then claimed they never sold the car. What they tell me the car was parked in a friend’s garage who then moved and sold the car without telling them.

He said I probably don't have a V5 as he does, yet I have a V5C from the person I brought it off in 2013 that states I’m the registered keeper. Of course V5 is not proof of ownership, but I am now scared to lose my classic, which I’ve spent lots of money on. What should I do?