Blandford 1969 - that is a very impressive first post!
Let me fill in the background. This is purely out of historical interest (I am not trying to model it or something like that).
I knew Mangotsfield station well as a passenger (a teenage one!) during the last 5 years of its operation, but of course I was there to catch trains, or sometimes "spot" engines

. I knew the platforms well, from the point of view of a passenger, and I have a clear recollection of the island platforms that concurs with photographs that I have seen in more recent years.
My query, as I said in my original post, relates to the staff buildings on the centre platforms. If your nickname means that you hail from Blandford then the next bit might not mean much to you, but:-
As you walked onto the Bath bound platform from the footpath at the eastern end of the station, there was a wall, behind which was the stationmaster's house and the garden to that property. The wall still remains today.
At the end of that wall, IIRC, the station buildings started, and there was a covered way which led from the Bath bound platform to the down main line platform. The entrance to the booking office was to the left off that passageway, and behind the booking office window would have been the booking clerk's office. There were also public conveniences on the down main line platform which must have formed part of this central building. Perhaps there was a Porters Room or some such - I can't remember.
At some point since the station closed and the track formation was turned into a cycle path, the buildings were first demolished and then later an almost triangular wall was built over part of the area formerly covered by the station buildings. However, this "ornamental" wall does not sit on the foundations of the original station building - that was larger, and this can be seen by the fact that remnants of the concrete floor tiles that I recall being the floor covering in the booking office being outside that triangle.
Furthermore, there is a photograph here
http://commondatastorage.googleapis.com ... 371642.jpg which seems to suggest that the external wall facing towards Bristol was not in fact straight, but had a bay window in it. This area, between the station building at that end and the apex of the triangular part of the station, was not somewhere where I can recall the layout at all - not only was I more interested in the trains than the buildings at the time, but also as I recall it was usually choc-a-bloc with parcels barrows!
So, as I said, from a wholly personal historical interest point of view, my interest is in the layout of that central building. Now that I've written all that down, perhaps it might jog one or two memories and some information might start to come in!