'Beefeater' was a British and Free Norwegian undertaking to train and prepare Norwegian police battalions in neutral Sweden for deployment when the German forces in Norway surrendered at the end of the war (autumn 1944/May 1945).
The Allies appreciated the importance of having Norwegian police battalions in Sweden as a force that could be quickly deployed into their native country in the days immediately after the German capitulation. Both the plan and the battalions were eventually incorporated into 'Doomsday', the scheme devised and implemented to establish forces in southern Norway as soon as the German commander in Norway had accepted the Allied terms of surrender.