Nice shot of the cab roof detail for the modeller and quite rare to see a photo of a Hymek-hauled freight in South Wales despite them being so common.David J. Hayes says At first glance, the zero displayed in the headcode, representing the letter O, would appear to indicate a Class 6 freight service destined for the Southern Region, except that this working is heading west! Although I might be wrong, I believe the O may well have represented certain freights working within the South Wales area back then