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 part of the Lines moat was called Hilsea Lagoon and underwent transformations in the mid-1930s, becoming a boating lake. At the same time, the Eastern end of this lake saw its surrounding land converted into Hilsea Bastion Gardens.