Car testing: How to perform a 'corkscrew'

BBC News visited Millbrook Proving Ground in Bedfordshire to see how test vehicles are "corkscrewed" - this means flipping them over when moving at speed so they land on their back.

The information is then studied to improve safety features on next generation vehicles.

You can watch how this event unfolded live on Facebook

Follow video journalist Dougal Shaw on Twitter or Facebook.

Aerial footage courtesy of Sky Glide

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