SS Broompark was a British cargo ship which was torpedoed by a U-boat on 25 July 1942 and sank three days later. Launched in October 1939, it was operated by the Denholm Line. In June 1940 as part of Operation Ariel it brought 33 French scientists including Lew Kowarski and Hans Halban, and their families to Britain before the Fall of France. They brought with them 26 cans containing 185 kilograms (408 lb) of heavy water, machine tools, and $10 million in diamonds. The ship was torpedoed on 21 September 1940, but made port under its own steam.