There are dozens of Corvettes and Camaros, vast Cadillac town cars. Corvairs, Bel Airs and pickups. There’s stuff TG never knew even existed but now very much needs - a knee-high 1967 Chevy mid-engined sports car concept, an experimental Sixties fuel-cell transporter, a proto-Deltawing design study inspired by executive jets. There are many tailfins.

In short, this might just be the greatest automotive sweetshop on the planet. Especially if you have a thing for post-war American design. TG has a big thing for post-war American design.

The heritage centre is the baby of its creator: curator and GM lifer Greg Wallace (not that one). Working at Cadillac in the early Eighties, Greg realised no one was keeping tabs on the firm’s ultra-rare production and concept cars, and set about preserving them for future generations.

“There was stuff on its way to the scrapheap,” says Greg. “The path of least resistance is to throw it away. We’ve lost so many things over the years. We don’t want to lose any more…”