A GWR 4575 class 2-6-2T heads away from Clifton Bridge station with a train for Portishead on June 5, 1938.

Peter Kerslake says "Recorded from Clifton Down and looking towards Bristol this fine image has a Portishead bound service skirting the Avon, where the visible mudflats indicate a very low tide, this stretch of water famed for its substantial difference in high and low water levels of some twenty to thirty feet, I think the second largest difference anywhere .
Opened initially to serve vessels too large to enter Bristol City docks the line gained importance in 1927 with the opening of Portishead's first power station, with a second such post war station construced resulting in a new station and freight facility in 1954."

Photo: John P. Wilson/Rail Archive Stephenson