I have found a video on Youtube filmed from a train leaving Swansea Victoria heading for Pontarddulais. The esplanade seems to run parallel to the line from
Swansea Bay Station, its not on an embankment, more of a low sea wall. The track is covered in sand, blown from the beach. On the landward side there is a grass
area then a road. It aws filmed in 1964, which would be after the Mumbles Railway closed.
If the original photo was taken a few years earlier than first mentioned, the Mumbles Railway wouldn`t be there because it didn`t open until 1928. As for the view
across the bay, how big would Port Talbot steelworks have been in the 1920s. I really wouldn`t have a clue as to its size. I would assume it would have opened in the
late 19th or early 20th century. There may not of been that much to see from a distance.
I think the buildings and signals visible in the background are Swansea Bay Station rather than, St Helens Road Station, which had a large footbridge at its western end.