The 1937 Will Hay film 'Oh Mr Porter' may have filmed at a station on the Basingstoke to Alton branch line in Hampshire but; the business with the water tower is on Welwyn Garden City station. The final rail chase, back off the branch line onto the mainline, is off the Hertford branch for sure. Visible in the field on the outside of the bend are strange racks with panels on them. They are sheets of coloured plastic, experimentaly weathering in the sun, at I.C.I plastics, as was, at
Welwyn Garden City.