We’re fast approaching the busiest shopping period of the year. In just a few days Black Friday will mark the traditional start of the festive spending season, with billions spent on items over the few weeks between now and Christmas. But with so many of the sales moving online, how does the world’s biggest online retailer get ready to process millions of orders every single day?

In this Which? investigation we go behind the scenes at one of the UK’s largest Amazon fulfilment centres, finding out how the multi billion pound company operates. We’ll also ask whether Black Friday has had its day, and explore the shady online activity you should be aware of.

Read more about how to find the best Black Friday deals, and learn about our Great Value badge.