This was a British and Free Norwegian plan, created in Stockholm, the capital of neutral Sweden, by the Special Operations Executive, British Foreign Office and the Milorg military resistance organisation in Norway for the use of teams from the UK and Norway to move from Sweden and protect the bridges along the vital routes into Norway from Sweden as the defeat of Germany approached (February/May 1945).
The object of the undertaking was to ensure that the advance of the Norwegian 'police' units in 'Scale Minim' was not delayed as the German occupying forces in Norway decided that surrender was inevitable. It proved possible in the short time available to get only eight of the original 14 'Antipodes' sub-operations organised and implemented, although local Milorg groups in the eastern part of Norway were also used to help secure the numerous bridges over the Glomma river on the routes into Oslo.
At the same time the 'Wren', 'Clothall', and 'Sepals II' operations were also given an 'Antipodes' role and reinforced by additional officers. At least three officers also arrived in the Milorg’s D.11 district to assist local Milorg groups in preparing for bridge protection. The Milorg also made preparations in the relevant border districts to protect key bridges.