A BBC investigation finds seven companies on the platform selling plates without checking customers' documents.

Not road-legal. The old vehicle will no longer be legally drivable on public ... A plate transfer can potentially cause discrepancies, such as a plate number overlapping two different vehicles.

Stella Roscoe's discovered her car registration had been cloned ... The Home Office said: "The cloning and defacing of number plates affects road safety and provides cover for criminals.