Princess Anne's Battery was updated in the nineteenth and twentieth centuries, with the latter modernisation entailing the installation of four QF 5.25 inch guns with both anti-aircraft and coastal defence capabilities.
Princess Anne's Battery diperbarui pada abad ke-19 dan 20 melalui modernisasi yang melibatkan pemasangan empat meriam QF 5,25 inci dengan kemampuan antipewata dan pertahanan pantai.