Text on Flickr:
Upper left photo showing the Town Gas SOUTH Works in late 50s.
Upper right photo showing the same Works in 60s, which remained essentially the same.
The middle 2 pictures do reveal drastic change in plant layout within the same South Works, the ‘Segas’ Oil Gasification Plant on the right of the left-hand-side photo (commissioned after 1966) had replaced the coal retort plant and the coal stockpiling yard that can be seen on the middle right photo (taken in 1964) <Read more ...>
Date picture taken (to nearest decade for older photos):