Blacknor Fort

Blacknor Fort stands on the Isle of Portland’s western edge at Blacknor Point, a 20th-century coastal defence built between 1900 and 1902. It overlooks Lyme Bay and Portland Harbour, guarding naval sites on the island. The fort saw action in both world wars with two 9.2-inch guns mounted on its ramparts. On 27 April 1944, during Exercise Tiger, German E-boats attacked US troops practising landings at Slapton Sands. Blacknor’s gunners held fire to avoid hitting their own forces, and more than 600 Americans died that night. After the war the fort remained in service until 1956, when it was decommissioned. Today it is privately owned and divided into three separate properties, one built over a gun emplacement. Outside the main structure two small gun positions and an observation post survive on the cliff edge, offering a stark reminder of the site’s military past. Visitors walk along the cliff-top paths and see the surviving emplacements and post. The views stretch across Lyme Bay and the Chesil Beach shingle ridge. The fort’s concrete walls and gun pits stand against the sea wind, while Portland stone buildings blend with the rugged coastline. The contrast between the fort’s wartime role and its quiet present adds to the place’s historical weight.