The L&SWR was well aware that the DN&SR, like most start-up railway companies, was short of finances.
The DN&SR would get its route to Southampton whilst the L&SWR would be able to exercise control over its competitor.
Since the Fullerton to Hurstbourne Line was intended to handle heavy freight and express passenger traffic from the Midlands via the DN&SR it was built with double tracks and large stations at Longparish and Wherwell complete with extensive goods yards.
In the event the DN&SR rejected the L&SWR's proposal and pushed on with its own independent route.
During the Second World War, an ammunition storage depot was built near Longparish and the line handled a considerable amount of military traffic.
The freight service last ran on 28 May 1956, but the track remained and was used to store condemned vans and wagons.