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A former traffic cop was forced off the road after a fellow driver failed to spot he was already overtaking a lorry.
The shocking dash cam footage shows Mike Ashford-Smith begin to overtake a car and a lorry.
But as he gets alongside the SUV, it pulls out causing Mr Ashford-Smith to take evasive action in his Peugeot 207 estate.
He broke heavily but lost traction sending his car rolling over several times into a field.
He had been travelling with his wife along the A7 between Galashiels to Edinburgh when the crash happened.