not sure if this link works but here is Blandford station with it's strange looking signal box.
http://www.sdrt.org.uk/images01/blandf.jpg
it's unusal because it over hangs the good's shed line.
this was done because the station was on a curve and so gave the signalman a better view of the goods yard aswell as the main line.
anyone else know of strange looking signal boxes?