Operation Wilfred

Operation Wilfred was a British naval operation during the Second World War that involved the mining of the channel between Norway and its offshore islands to prevent the transport of Swedish iron ore through neutral Norwegian waters to be used to sustain the German war effort. The Allies assumed that Wilfred would provoke a German response in Norway and prepared a separate operation known as Plan R 4 to occupy Narvik and other important locations.

On 8 April 1940, the operation was partly carried out, but was overtaken by events as a result of the following day's German invasion of Norway and Denmark (Operation Weserübung), which instead began the Norwegian Campaign.