It's not everyday you come across a "car" that looks like this, parked up near London's Mall. Looks like a 70's era Batmobile to me and it definitely drew some attention.
I overheard the owner (or driver) telling someone how they had to plan their route carefully to avoid any speed bumps (the car rides low), and how it wasn't very waterproof. Maybe not a good combination in London. Better in Gotham!
I didn't hear the engine running, perhaps just as well.