Four teams of brilliant bodgers have just six weeks and £1,500 to buy and build roadworthy road hogs to travel the length and breadth of Britain. The cars will also need to be readily convertible to face a series of challenges. The first test is proving their hog is truly roadworthy and then racing head-to-head to decide who'll take the early top spot on the leader-board. The judge Peter Lambert is the man who examines the examiners of the SVA (Single Vehicle Approval) test. The SVA makes sure that new or substantially modified vehicles are safe to drive on British roads. Peter is a talented engineer in his own right, having built a number of road-goers himself. He is also a lover of motorbikes and steam engines.