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This is the terrifying moment that a Polish lorry driver causes a massive crash by careering into the side of an unwitting driver's car, forcing them into crash barriers.
The dashcam footage, which was shared by Thames Valley Police, shows the driver of a white Volkswagen Sirocco sitting in the middle lane of the M1 motorway.
The lorry next to them, driven by Zbigniew Kaczorowski, 55, from Poland, then tries to turn into the lane and instead crashes into the side of the car, near its rear wheel.