Ouaisne Tower

Ouaisne Tower was also known as Le Tour du Hoiner and St. Brelade's No 1 and was constructed in the 1780s.
During the Napoleonic Wars it
was equipped with one 18-pounder cannon mounted on its roof.
Today it is painted red on the seaward side as a navigation mark and is in private ownership.

https://www.waymarking.com/waymarks/WMWMH7_Ouaisne_Tower_Ouaisne_Bay_Jersey_Channel_Islands