Overview
- Sainsbury’s has suspended the Facewatch live facial recognition system at its East Dulwich store while it investigates a case in which a customer was wrongly stopped and asked to leave after an alert; the company contacted the man to apologise.
- The customer, Matt Arnold, said he was escorted from a self‑checkout after staff said the cameras had flagged him; he later saw his face marked on an overhead monitor.
- Sainsbury’s and supplier Facewatch say the system issued a correct alert but the wrongful challenge resulted from human error in how staff handled the alert, and they point to a claimed accuracy rate of about 99.8–99.98 percent.
- Critics note this is at least the second reported misidentification in London stores and point to British Transport Police data showing only one flag from roughly 330,000 scans — a false alarm — to question the practical value and fairness of mass biometric checks.
- Civil liberties groups are urging Sainsbury’s to stop using the technology because it treats all customers as suspects and risks public humiliation, and the incident may prompt closer scrutiny of store procedures and wider debate over retail use of live facial recognition.