We regularly do Didcot to Upton on the old Didcot, Newbury & Southampton. Its just round the corner from us and you are into the Hagbournes in a blink of an eye. Fortunately a plan to build houses along one side between Didcot and East Hagbourne has been stopped, so it remains a green boundary between Didcot and the villages. It rises from ground level up to above house height very quickly, so must have been a bit of a slog for a heavily loaded train. Its one section of the line that doesn't seem to have been photographed much either.