Too scared to shop: How facial recognition leaves innocent UK shoppers stranded

Instead, both were victims of private facial recognition systems that have quietly rolled out across UK high streets in recent years.

It also invited representatives from Sainsbury's, a company that is currently in the process of introducing facial recognition to 200 of its stores.

Crucially, ask which third-party facial recognition company the retailer uses.

Submit a Subject Access Request (SAR): Under UK data protection law, you have the right to see the data held about you.

Send a formal SAR to both the supermarket's data protection officer and the facial recognition provider.