Yup, they just long exposure shots, dead easy, but you HAVE to have a tripod, nobody on earth has hands that steady

Slightest movement and it wont be sharp.

The Canary Wharf shots are great, theres a sly way in where you can get to right under the skyscrapers, on to the old bit, so you approx 2/3 floors below ground floor of the Skyscrapers, and its probably THE best car shoot location there is.