In the 1930s, the Western end of the Lines moat became known as the Hilsea Lagoon and in the mid-1930s work was done on the banks and it was turned into a boating lake. In the same period, the land around the Eastern end of the boating lake was converted into Hilsea Bastion Gardens.
In the 1930s, the Western end of the Lines moat was referred to as Hilsea Lagoon, and in the mid-1930s, work was done on its banks, transforming it into a boating lake. During the same period, the land surrounding the Eastern end of this boating lake was converted into Hilsea Bastion Gardens.