Countryfile - 17/08/2008

John Craven heads to the countryside of Leith Hill in Dorking, which inspired composer Ralph Vaughan Williams, while Miriam O'Reilly investigates why the rising cost of fertiliser means some farmers are spreading sewage on their fields. Plus, Adam Henson reports on the threat to the cockle fishing industry on Burry Inlet in Wales. All that and some top tips on cool camping.