Countryfile - 28/03/2010

Julia Bradbury and her dad go walking in Dovedale, where she first fell in love with the great outdoors. Matt Baker's on exercise with a team dedicated to fighting wild fires, and finds out why a helicopter comes in handy. A mysterious hole has opened up in one of Adam Henson's fields, just what is down there? Meanwhile John Craven investigates plans for Britain's largest dairy herd.