It Finally Happened.

Yes.
This is a picture of a Reliant Robin three-wheel car, captured in the wild.
Incredibly, the engine is in the front, over the single, undriven steering undercarriage wheel.
It drives the rear wheels.
Back when I was a kid it was common to see 'Bubble Cars' made by Heinkel and Messerschmidt.
These were much smaller, but also much more rational, with two wheels at the front and the rear wheel driven by a rear engine.
Far more dynamically sound.

Anyway, Messerschmidt is now part of helicopter company MBB. Don't know what happened to Heinkel.
Reliant is definitely still around.