Retail season 'starts with bang'
Consumers spent an estimated £720 million on Cyber Monday as the UK shopping spree continued apace.
It follows the £810 million spent on Black Friday, with shoppers making 180 million online visits to UK retail sites - up by 60% on last year, according to Experian-IMRG.
The figures "beat all predictions", the group said.
Giles Longhurst, general manager of consumer insight at Experian Marketing Services, said: "Black Friday exceeded expectations for retailers, seeing a record breaking 180 million website visits and an approximate £810 million spent online in a 24 hour period.
"This 60% year-on-year increase in visit numbers to retail websites clearly shows that both British shoppers and British retailers have fully embraced the Black Friday trend.
"With such a massive amount of money and time being spent online, shoppers have really begun the Christmas retail season with a bang."
Last year's Cyber Monday was Amazon UK's then busiest day of sales ever, with more than 4.1 million items ordered at a rate of around 47 per second, with sales peaking at 9.22pm.
But after it sold 5.5 million items through its UK website on Black Friday, Amazon said this year's Cyber Monday would have to be a "huge day" to beat it.
Superdrug said Cyber Monday saw 250,000 visitors to Superdrug.com, up 50% on last year.
Best-sellers included 30,000 bottles of perfume, 13,000 electric toothbrushes and 2,500 Elizabeth Arden skincare sets.
Electricals retailer ao.com said it experienced its busiest trading weekend in its 14 year history.
John Coulter, ao.com's UK retail director, said: "We saw record traffic and sales levels on the ao.com site and our sales were up dramatically year on year on Black Friday.
"Our Cyber Monday trading figures didn't beat that of Black Friday but we did see more traffic in the evening on Cyber Monday than on Black Friday as people logged-on to shop from the comfort of their own home and avoid the rushes taking place in stores."