What Makes A Classic?

A 289 AC Cobra comes in with an intermittent indicator issue but has the team scratching their heads about the provenance of the car. Amand heads to The Classic event at the historic Silverstone racetrack with the car's owner. Colin helps to fit wing mirrors on a car that's often mistaken for a Lada, a 1972 Fiat 124 Special T and Mark tries to get to the bottom of what's causing a 1968 Daimler to sound its horn at all the wrong times.