
Facial recognition is spreading through UK shops, with Facewatch urging stricter regulation while SAI partners with the Retail Trust, amid retail theft costing about £4 billion a year in losses and prevention. Big Brother Watch is campaigning against store use, a petition has gathered over 42,000 signatures, and Sainsbury's paused one store's system after a customer was wrongly ejected. The story shows automated identification becoming routine in everyday commerce before a clear legal framework exists, which raises the question of who sets the limits on persistent identification.