'Anvil' (i) was a British operation by the Special Operations Executive to establish radio contact and organise resistance groups in the area round Lillehammer in German-occupied Norway (5 February 1942/May 1945).

A two-man Norwegian party (J. Gunleiksrud as the organiser and F. B. Johnsen, who followed on 12 March as the radio operator) was delivered by sea. Gunleiksrud was arrested on arrival in February by the local resistance group on suspicion of being a provocateur and, after additionally falling foul of the central organisation in Oslo, left for Sweden in July. Johnsen remained in Norway to the end of the war.