It has looked at the airworthiness of the Nimrod MR2 fleet since its introduction into service in 1979.

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Ms Emptage's Toyota MR2 was involved in a collision with an ambulance near Rowlands Gill, Gateshead, and it took the emergency services more than an hour to cut her free.

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Costs are kept low by using production car engines, with the Dallara being powered by a unit straight out of a Toyota MR2, and by making tyres last two or three races.

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