firstly, would I be right in assuming this is a tram shed here, next to the station?
...and on the other side of the bridge, repair works have revealed these stairs, leading to the site of the original staion, I reckon...what do you think?
I have also been told it was associated with the trams, perhaps to provide power, but the article from the Railway Journal on the development of Forest Hill station <uploaded by Falkor elsewhere> says this about it:
The [railway] line through Forest Hill was electrified in 1928 and a sub-station was built on part of the site of the atmospheric buildings.
Thus the building was a sub-station, built to provide energy for the newly electrified railway line.
thanks again Steve...
it was the high doorway that made me think of trams, but that makes sense.
Is there any remnant of the atmospheric railway, do you know...just while we're on the subject?