Qualla: Casquets Lighthouses

Casquets Lighthouses: Introduction

Wed, 20 May 2026 00:00:00 GMT

Photo credit Andree Stephan, CC BY 3.0. The choice to build three lighthouses on one rock was a deliberate exercise in visual fingerprinting. By the early 1720s, the Casquets - a jagged outcrop seven miles west of Alderney - had drowned enough ships that the rationale for a light was obvious. The harder problem was how to keep mariners from confusing it with the French lights to the south or the brand-new double tower at Portland Bill to the north. Three coal fires arranged in a tight cluster created an unmistakable signature: a distinctive triangle of flame that could only be the Casquets. They were named St Peter's, St Thomas, and Dungeon. They were lit, simultaneously, on 30 October 1724. Three centuries later, on 13 July 2024, Trinity House quietly unveiled a tercentenary plaque inside the active tower.

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Image: Andree Stephan | CC BY 3.0

Casquets Lighthouses: Three Coal Fires Above a Drowning Rock

Wed, 20 May 2026 00:00:00 GMT

Photo credit Man vyi, Public domain. The towers were quarried from the rock itself, the two western ones taller than the third so all three flames sat at the same elevation. The arrangement was the work of Thomas Le Cocq, who held the right to operate the lights from Trinity House for £50 a year - and charged passin...

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Image: Man vyi | Public domain

Casquets Lighthouses: A Family Living on a Rock

Wed, 20 May 2026 00:00:00 GMT

Photo credit Daniel Kraft, CC BY-SA 3.0. By the 19th century the lights were being mechanised. A single clockwork mechanism, connected to all three towers by a clever rigging of ropes and sheaves, revolved the lamps in synchrony. The compound on the rock had grown into something between an outpost and a small holding. T...

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Image: Daniel Kraft | CC BY-SA 3.0

Casquets Lighthouses: From Coal Brazier to LED

Wed, 20 May 2026 00:00:00 GMT

Photo credit Louis Le Breton, Public domain. A new revolving apparatus arrived in 1818, needing to be wound every ninety minutes. In 1847 a 12-hundredweight fog bell was bolted to a small square tower near the Dungeon light, ringing once every five minutes when visibility dropped. In 1858 the towers got individual clockwork...

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Image: Louis Le Breton | Public domain

Casquets Lighthouses: Solar, Wind, and a Quieter Rock

Wed, 20 May 2026 00:00:00 GMT

Photo credit Juan Gutierrez Andres, CC BY-SA 4.0. Automation came in 1990. The keepers left. The old diaphone was decommissioned and an electric fog signal took its place on the parapet. In 2010 Trinity House began a two-year modernisation that converted the station to run entirely on solar and wind power. The visible range was ...

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Image: Juan Gutierrez Andres | CC BY-SA 4.0