Supermarket giant Tesco is being mocked online after bringing in 'VAR-style' AI action replays at self-service checkouts.

The cameras, which are designed to pick up if an item has not been scanned properly before placed in the bagging area, have been the butt of jokes after viral social media footage showed the new technology in action.

A bird's-eye-view camera above each of the tills records shoppers scanning and packing their items, using AI to detect if an object has failed to scan.

But critics have complained the new technology could make the already frustrating self-service machines even worse, with more false errors being flagged by AI.

In a video shared to Instagram that has amassed close to three million views, a shopper shows how the new software works.