Sainsbury's has been accused of putting shoppers at risk of fraud after it emerged it has been filming them entering their PINs and broadcasting the live CCTV footage in stores.

The supermarket is being investigated by privacy watchdogs after customers complained new security cameras placed above its self-service checkouts were filming them tapping in their PIN, it can be revealed.

The cameras, which record shoppers at around waist height as they scan and pay for their shopping, are installed in 300 Sainsbury's stores in a bid to deter shoppers from stealing low-value items by not scanning them at self-service checkouts.

The live at-the-till footage is shown on screens visible to other customers, leading to fears people could have had their details compromised.

On Sunday Sainsbury's faced calls to remove the cameras as privacy campaigners warned people's privacy was being put at risk.