Because there is no pedestrian access to this station the cache is a bit away from it.
About Smallbrook Junction Station

Smallbrook Junction railway station is a railway station on the Isle of Wight, England. It is unusual because it has no public access but exists purely to provide a connection between two rail systems.
The station was opened in 1991 by British Rail when the Isle of Wight Steam Railway was extended to reach the Island Line, in order to provide a passenger interchange between the two. It is only served on days that both the Island Line and the Steam Railway are open, as there is no access either by path or by road.
Prior to 1991 there was no station on this site, but it was still an important railway junction. "Smallbrook Junction" is the historic name, long predating the station. Between 1875 and 1926 there were two separate lines here, independently run by the Isle of Wight Central Railway and the Isle of Wight Railway. In 1926, following the island's rail network passing to the Southern Railway, a signal box and turnouts were installed at Smallbrook. From then until 1966, the line was the Junction between the Ryde Pier Head to Ventnor and Ryde Pier Head to Newport Lines. The junction has been featured in many photographs from the time.