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PETERBOROUGH, ENGLAND - NOVEMBER 15: Members of staff process purchased items in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England. A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon. (Photo by Leon Neal/Getty Images)

PETERBOROUGH, ENGLAND - NOVEMBER 15:  Members of staff process purchased items in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England.  A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon.  (Photo by Leon Neal/Getty Images)

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PETERBOROUGH, ENGLAND - NOVEMBER 15: A close-up of Amazon gift-wrap packaging labels in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England. A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon. (Photo by Leon Neal/Getty Images)

PETERBOROUGH, ENGLAND - NOVEMBER 15:  A close-up of Amazon gift-wrap packaging labels in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England.  A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon.  (Photo by Leon Neal/Getty Images)

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PETERBOROUGH, ENGLAND - NOVEMBER 15: A close-up of a packaged Amazon Prime item in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England. A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon. (Photo by Leon Neal/Getty Images)

PETERBOROUGH, ENGLAND - NOVEMBER 15:  A close-up of a packaged Amazon Prime item in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England.  A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon.  (Photo by Leon Neal/Getty Images)

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PETERBOROUGH, ENGLAND - NOVEMBER 15: Members of staff process purchased items in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England. A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon. (Photo by Leon Neal/Getty Images)

PETERBOROUGH, ENGLAND - NOVEMBER 15:  Members of staff process purchased items in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England.  A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon.  (Photo by Leon Neal/Getty Images)

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PETERBOROUGH, ENGLAND - NOVEMBER 15: Members of staff process purchased items in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England. A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon. (Photo by Leon Neal/Getty Images)

PETERBOROUGH, ENGLAND - NOVEMBER 15:  Members of staff process purchased items in the Amazon Fulfilment centre on November 15, 2017 in Peterborough, England.  A report in the US has suggested that over half of all online purchases this Christmas will be made with Amazon.  (Photo by Leon Neal/Getty Images)