During World War Two, whilst Norway was occupied by Nazi Germany, a group of Norwegian sailors set up a base on the Shetland Islands and began aiding their country’s resistance.

Named “The Shetland Bus” they made perilous journeys across the North Sea in fishing boats - smuggling agents, equipment and ammunition into Norway.

Their most famous skipper was Leif Larsen. He made more than 50 journeys to and from occupied Norway during the war and became one of the highest decorated naval officers of World War Two.

Tim O’Callaghan tells his story using archive interviews Leif gave to the BBC in 1981 and 1985.

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(Photo: The Shetland Bus crew, Leif Larsen second from left next to agent in white coat. Credit: David Howarth)