Motor Morphers: Jason Bradbury reveals that this week's task is to convert a two-ton milk float into a high-speed dragster, with the two teams using as much of the original vehicle's materials as possible in their new designs - but they also have a kitty of £500 for any extras they wish to bolt on. After four days of building time, their contraptions are taken to a drag-racing strip where they will take part in a head-to-head race.

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Documentary