A total of £3.3 billion was spent by online shoppers in the UK over the four-day Black Friday weekend.
This is according to the latest data from IMRG and Experian, which also offered a breakdown as to how the spend was split.
Some £1.1 billion was spent on the Friday itself, with £561 million, £676 million and £968 million spent on the Saturday, Sunday and Monday respectively.
However, retail consultant LCP Consulting has warned that around ten per cent of the 22 million parcels set to be delivered over the next week will not arrive on time.
An increase of four million next-day delivery promises is said to have placed considerable strain on retailers, which has prompted the delays.
Retail partner at LCP Consulting Stuart Higgins said: "With one in ten deliveries risking failure this Christmas, retailers need to ensure they don’t promise what they can't deliver or the customers will simply find a competitor who can."