Retailers are promising consumers an early Christmas bonanza as the US shopping event Black Friday takes hold in the UK.
Some of the biggest names on the high street will be slashing their prices tomorrow, while Amazon is hoping to beat the 41 items it sold per second on Monday December 3 last year.
The US event traditionally takes place on the Friday following Thanksgiving and marks the beginning of the Christmas shopping season.
It is followed by Cyber Monday on December 2, predicted to be the busiest day for online shopping.
John Lewis said customers would be able to save up to 50% on selected small electrical and audio items tomorrow, up to £200 on selected large appliances and laptops and up to 25% on selected tvs.
Ed Connolly, buying director for John Lewis electricals and home technology, said: "Black Friday has become a huge promotional event in America and we have also seen customers respond well to this day in the UK.
"We're really looking forward to sharing incredible deals with our customers on what promises to be a very exciting shopping day."
Asda promised "earth-shattering savings" with deals on electronics, toys and gadgets through to everyday essentials such as batteries, describing Black Friday as "the most dramatic shopping event to ever hit British stores".
Asda's chief merchandising officer for general merchandise, Andrew Moore, said: "Last year Walmart reported their best ever Black Friday event with stores in the US serving over 22 million customers in one day.
"We're taking our lead from them and utilising their know-how to help create an offer that means Asda shoppers can benefit from incredible savings at a time when they really need us the most.
"Given these never-been-seen-before deals, we're anticipating tomorrow to be the busiest shopping day of the year so far, so we would encourage customers to head to store quickly to avoid disappointment, because once stock is gone - it's gone."
The Asda event will launch in-store tomorrow with deals available all weekend whilst stocks last, although the retailer is expecting popular goods such as the LG 42" plasma tv and Cyclone Explorer 7" tablet to sell out within two hours.
Amazon UK managing director Christopher North said: "Since we started Black Friday deals in the UK in 2010, the concept has really caught on and is now a much-anticipated event in the UK shopping calendar.
"Last year we offered millions of pounds off more than 1,000 deals including high-spec coffee machines, signed CDs and Kindle Fire devices.
"This year we'll be releasing twice as many deals to make it easy for customers to save money on this year's must have gifts."
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