Inside A Fortnum And Mason Plc "Pop-Up" Store [Getty Images]

An employee places a jar of cranberry sauce into a festive food hamper inside a pop-up store, operated by Fortnum & Mason Plc, during a seasonal Christmas event at Somerset House in London, U.K., on Tuesday, Dec. 9, 2014. The British will be the biggest spenders in Europe on Christmas gifts this year, according to a study commissioned by Dutch bank ING Groep NV. Photographer: Simon Dawson/Bloomberg via Getty Images

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