Watch Scrapheap Challenge online: Episode 7 Smooth Riders

Young One swing out of control This week, two returning teams did battle to become the smoothest on the 'heap. The Barley Pickers and the Young Ones were challenged to build a vehicle capable of transporting a brimming vat of liquid over rough terrain. The team that spilled the least would win. In round one the Barleys came out ahead, but only by a drop or two. But the more bumpy terrain of round two was a jolt too far for the Young Ones' machine. The vat kept hitting their supporting frame – major spillage! Round two to the farmers. In round three the teams drove each other's machines and attempted to spill as much as possible. Young One Tom stepped up and tried his level best to swing the Barleys' pendulum, but their suspension system worked a treat and he only managed to spill a few drops. But Barley Picker Robin got really messy. By the end of the course his vat was empty and the Devonshire farmers had booked themselves a place in the semi-finals.

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