poster showing Orford Ness lighthouse, England

This 30-metre (98 ft) tower was completed in 1792, was automated in 1965 and deactivated in 2013 because of the encroaching sea. The modern electrical equipment and hazardous materials (mercury) have been removed. 

Trinity House has increased the power of the light at Southwold Lighthouse to compensate for the closure of Orfordness lighthouse. Unless demolished, the Orfordness tower is expected to survive for seven to eight years before falling into the North Sea.

Full article