Les Hanois

Les Hanois Lighthouse was constructed between 1860 and 1862 to a design by James Walker, and was first lit on 8 December 1862. It is sited on the rock known as Le Biseau, or Le Bisé, part of the reef Les Hanois one mile north west of Pleinmont where the Trinity House cottages were built and it marks the shoals and reefs off Guernsey and gives a position fix for ships entering the Channel Traffic Separation Scheme.

It was James Douglass who pioneered the dovetailing together both laterally and vertically of the blocks that comprise rock lighthouses. This together with the cement mortar in the joint formed between the faces so locked the dovetails that the stones cannot be separated without being broken. This method was first employed at the Les Hanois Lighthouse, and it became the pattern for all sea rock towers.

A helideck was constructed above the lantern in 1979. Automation work began at the Les Hanois Lighthouse in July 1995 and the station was de-manned in January 1996.

The station was converted to solar power with panels mounted around the lower part of the helideck support structure.