Why was I humiliated by Waitrose self-scan check?

The Quick Check system was quick and really good … until the security reviewI have just been humiliated by Waitrose after self-scanning a big shop in my local branch, when I was “randomly” picked for a re-scan. I admit I didn’t read the terms and conditions. I saw a display in store a few months ago about self-scanning and so I registered and started shopping. It has been really good, making shopping faster as I don’t have to re-pack. But I had never heard of havin