 After a brief tutelage with innovative BBC documentary producer Denis Mitchell, Dennis Potter teamed with producer Anthony de Lotbiniere to film a documentary (later described by David Niven as "absolutely wonderful"). Returning to the Berry Hill roots of his childhood, Potter used interviews with locals (including his parents) to show changes in the working-class traditions of the Forest of Dean, where "the green forest has a deep black heart beneath its sudden hills, pushing up slag heaps and gray little villages clustering around the coal."