Online sales rose 18% Y-o-Y in the UK in December 2012

"Strong growth in online shopping stopped retail sales falling in December, according to the British Retail Consortium (BRC).
Sales in December were up 1.5% compared with a year earlier, while like-for-like sales, which exclude new store openings, rose 0.3%.
Without a 17.8% jump in online non-food sales, total sales would have fallen."

Source:  BBC News, 8th January 2013