'You just walk right out' "But apparently there are cameras watching me. And then you just walk out! It didn't seem right but I was assured it was okay!" she added. Amazon has said the store, which is similar to 20 Amazon Go outlets in the United States, uses "deep learning" algorithms - technology which allows machines to learn by themselves - with cameras and sensors to tell what customers have picked up. "It automatically knows what you've got in your basket and when you leave the shop it charges you and bills you automatically into the account you have set up," said Erica Ely, a 57-year-old local resident, holding her purchases on the street outside the shop.