Just watched the recent documentary on the Great Train Robbery. They used a lot of stock film of driving through London in the late 60s/early 70s, in which several Commers can be seen - the first around 16m going down whitehall. Also showed a bit of footage of some of the robbers being taken away in a PA with an Aylesbury registration on it.
http://www.channel4.com/programmes/the-great-train-robberys-missing-mastermind/4od
http://www.channel4.com/programmes/the-great-train-robberys-missing-mastermind/4od