There was a crowd of 3,500 festive bargain-hunters queuing outside Selfridges in London this morning with the first person arriving at the store at 11.30pm on Christmas Day, a spokeswoman said.
Long queues formed at Gucci, Mulberry, Prada and other various designer concessions within the store.
Online sales at Selfridges are up 110% on last year, she added.
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A Met Office warning covering much of England and south-east Wales is expected to remain in place until 11am.
A band of cloud and patchy rain is expected across Scotland and Northern Ireland, moving southeast as the day progresses.