Enfield Lock was the main station for the Royal Small Arms Factory until it was closed in the late 1980s , and now it is used by the large housing development on the site known as Enfield Island Village and the Innova Science and Business park . Enfield Lock was the main station for the Royal Small Arms Factory until its closure in the late 1980s , and now serves the large housing development on the site known as Enfield Island Village , as well as the nearby Innova Science and Business park .