Sean Fletcher goes wild in the Hambleden Valley in Buckinghamshire, on a whistle-stop tour of a chocolate-box landscape that has been the backdrop for many a TV drama and film. He also finds out how the old cottage industry of lace-making is poised for a comeback, and saddles up to meet a farming couple opening up their farm to enable safer riding in this corner of the countryside. Adam Henson is busy with some new arrivals and, as picking season dawns, Charlotte Smith investigates whether UK farmers can cover a shortfall in the number of seasonal farm workers needed to gather their harvests