The Lamp Room is a tiny octagonal building just to the west from the end of the platform at the Railway Station. It was built to house flammable liquids used in lamps for signals and other items requiring fuels of very flammable nature that would be dangerous closer to places where passengers or workers would be located on the main platform. The potential to be an explosive environment might also explain the design - to control or contain an explosion.
Thanks to a Wikipedia editor and the State Records Office for identifying the purpose of the building and providing the data above. And thanks to Mary Yates for asking the question.
Garry Gillard | New: 10 October, 2017 | Now: 10 October, 2017