Hop growers are warning that unless something changes many won’t be able to continue. They say the cost of producing hops is up by 25% on last year - but that's not being reflected in what they’re being paid. All week we're looking at machinery, great and small. Technology is often held up as the answer to many of the challenges agriculture faces, from improving efficiency, to reducing costs and fertiliser use, and solving labour shortages. And a low tech solution to a prickly problem: Highland Cattle are being asked to start work on the windswept Spurn peninsula in East Yorkshire. Presented by Charlotte Smith and produced by Beatrice Fenton.