The consumer group price checked 83 items on sale during the promotional period last year and found that almost all of them were available either for the same price or cheaper at other times of the year.

It warned consumers that the annual shopping event was “all hype” with “few genuine discounts” on offer for shoppers.

Which? analysed the price of products during the six months before and after last year’s Black Friday and found that just four of the 83 products surveyed were cheaper on Black Friday than at any other time of the year.