Quite how the fashion for festive jumpers once only seen on the likes of bygone crooners such as Val Doonican and Bing Crosby took hold is not clear.
Fashion pundits say that Sarah Lund's Faroese sweater, which gained cult status when it appeared throughout The Killing, played a part.
Perhaps it was that which led to old-fashioned knitwear designs being picked up by hipsters as part of a retro trend built around east London's vintage stores. (Butler, 2013b).
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