Detail, Royal Arsenal Gatehouse
Introduction
The photograph on this page of Detail, Royal Arsenal Gatehouse by Derek Harper as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk

Image: © Derek Harper Taken: 24 Feb 2019
The bell tower doesn't get a mention in the listed building description at https://historicengland.org.uk/listing/the-list/list-entry/1079080 ; it was added 31 years after the original construction https://en.wikipedia.org/wiki/Royal_Arsenal_Gatehouse . The listing does, however, include the mortar: "On parapets of side abutments are mounted mortars with the Royal Cipher of George IV"