These pictures are digital C-prints that were created using screen grabs from the computer. Each image is compiled using either Google Streetview or Mapjack. I would use the software to find reflections of the van taking the image in store windows. Then, using photoshop, I collaged the images together to re-construct the vehicles.
So everything you see in the image is a reflection.
link to a location in london where you can see the reflection of the car.