And in more gloomy news, overall UK retail sales saw zero growth in December - marking the worst performance for a decade, according to a survey from the British Retail Consortium and financial group KPMG.
"Retailers are battling a perfect storm of headwinds, with consumers lacking confidence... primarily because of Brexit, one would assume," Markets.com analyst Neil Wilson told AFP.
Since Britain voted to leave the European Union in 2016, a drop in sterling - making imported goods more expensive - has pushed up UK annual inflation and prompted many consumers to tighten their belts. Brexit has also sparked widespread economic uncertainty because of the threat of a disorderly departure from the bloc at the end of March.
Rising costs and rents have meanwhile made physical bricks-and-mortar retailers less competitive - in contrast to online rivals.
"Online shopping is the big one ... meaning (that) high street footfall is collapsing," Wilson added.
"This has a snowball effect as the more shops close and replacements are not found, shoppers are left with little reason to head to the high street."
Price-slashing German-owned discounters Aldi and Lidl, as well as US online titan Amazon, continue to put intense pressure on Britain's retail sector.
Tesco has sought to compete more effectively, launching its own chain of UK discount food stores named "Jack's".
Tesco on Thursday said its total like-for-like sales, stripping out new floor space, grew 1.5 percent in the six weeks to January 5 from a year earlier.
And in home market Britain, sales rose 2.2 percent on price-cutting for traditional Christmas vegetables and meat. That was Tesco's best UK festive performance since 2009.
The grocer was also boosted by wholesale division Booker, which it bought last year to help slash costs.
"Tesco has defied the retail gloom and delivered a pick-of-the-bunch performance," added Interactive Investor analyst Richard Hunter.
But he warned that the retail outlook was unclear as shoppers become more price sensitive in the face of uncertainty.
"Prospects for the UK economic environment remain nebulous, with a nervous consumer potentially looking to shop on price alone."
M&S meanwhile saw like-for-like UK sales sink 2.2 percent in the group's third quarter, or 13 weeks to December 29, from a year earlier.
Chief executive Steve Rowe said Thursday that it experienced a "steady" performance - but nevertheless faced a "backdrop of well publicised difficult market conditions".
Unusually warm weather and falling consumer confidence made for a "very challenging" November, it noted, but held annual profit guidance.
Recent data from the GfK institute showed that consumer confidence in Britain fell to its lowest level in five years in December, as the purchase power of wages was eroded by Brexit-fuelled inflation.
Some 150,000 jobs were meanwhile lost in the nation's retail sector last year.
At the end of 2018, music retail chain HMV collapsed into administration for the second time in six years, placing 2,200 jobs at risk.
"The latest (sales) numbers from the British Retail Consortium are proof, if it were needed, that this is a torrid time for retailers," concluded Hunter.