There are so many songs that were made up by sailors and very few ever knew where they originated. The version of Gosport Nancy I learned at HMS Sultan 1968 was said to be a WW2 song. This is the only part of a verse I remember that differs from other versions

Gosport Girls all love their tars
Gosport girls prop up all the bars
They will take you all the way boys
Blockhouse, Haslar, and Priddys Hard