Rare is an entirely inadequate word to describe this car.
Spotting a Bugatti on the street isn’t exactly unheard of. Hundreds of them exist at this point with owners who tend to show off. But slightly rarer is to spot one of the Veyron special editions. Bugatti’s special editions are all one-offs, so being able to spot a specific one depends entirely on luck. We’re glad that someone had a camera when the Veyron Sang Bleu (blue blood) showed up in what we assume to be London.
It’s a shame that the traffic meant the owner couldn’t open it up, but then, when there’s only one of your car, it’s probably best to behave while people are watching anyway.