Thanks to Kevin by Lending me this photo, and telling me what happend next !!

As kevin wrote me "my mk1 cooper "s" Starting to roll after crossing the finish line at the Isle of Man T.T. Course hillclimb many years ago.
The photographer had to duck down being the ARMCO BARRIER after taking the photo as the car rolled over the top of him and destroyed itself !"

It appeared that this car was also an EX-works mini. (reg number until now unknown)