must have been this HUMMER 3 pictured above.
It was parked behind the Royal Academy. But it was not, as one may have thought, the latest toy of some eccentric petrol-head. The waiter in a nearby restaurant told me that the car had arrived on normal tyres which were then swapped for the wooden wheels. Apparently the car had been there for over a week.
It looks like the owner is willing to accept all the parking tickets in exchange for every second passer-by invariably stopping, grinning and taking a photo of this unusual sight.
But, is it art...?