Hi Steve,
The opposite for us, well SWMBO, as you may know, we now pay 5p for polly bags, so SWMBO took her Sainsburys bag in with her to go upstairs to the clothes dept. Having selected her purchase and paid for it upstairs, we went back down the lift with said item in the bag. We got as far as the security exit when, yup the alarm went off. I went out to the car, while she went over to the Customer Services, showed the receipt and was told to wait a minute, she was then presented with TWO bunches of flowers, one bunch was orchids. This was for all the inconvienence, they said. So they aint all bad at Sainsburys. I personally find the staff at the checkouts there, very polite.
Iain.