How do I safely buy a car?

Posted by anomalous_cowherd@reddit | AskUK | View on Reddit | 15 comments

I just saw a post on LegalAdviceUK about someone who bought a car off someone who didn't own it (it was a Motability lease) and who left the country immediately afterwards. It didn't sound hopeful that they'd get their money back.

Several of the comments said to never buy a car if the seller didn't have the V5 registration document, which seems like a reasonable point BUT I've always understood that the V5 is only about the registered keeper and nothing to do with legal ownership. Not having it is clearly a red flag, but how could I actually prove that someone owns the car they are selling?