A series of daring raids - Operations Grouse, Freshman and Gunnerside - neutralised the plant's capacity. In Operation Freshman, every single glider-borne paratrooper was either captured or killed. In February 1943, a force of SOE-trained Norwegian Commandos succeeded in sabotaging the plant's production capacity. Further manufacturing effort was abandoned, and the Nazis attempted to spirit away the heavy water they had on the ferry SF Hydro. The Norwegians managed to sink the vessel in the deep waters of Lake Tinn.
Using primary source material and published on the 80th anniversary of the sinking of the Hydro, The Heavy Water War tells a story of extraordinary courage and endurance. The stakes in any special forces raid in history have never been higher.