For me it's because when I visit a store it's for a small amount of items. My main shopping is online and delivered (by Tesco) once a week. But there are always other things needed during the week. The big Tesco near me mostly has people doing their big shop at the tills so the queue will be 5 minutes plus. Scan as you shop ( as mentioned by the GP) now works well and doesn't check you each time so it's easy to do - particularly as you can use your bag as you go and don't need to repack when you check out.
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For me it's because when I visit a store it's for a small amount of items. My main shopping is online and delivered (by Tesco) once a week. But there are always other things needed during the week. The big Tesco near me mostly has people doing their big shop at the tills so the queue will be 5 minutes plus. Scan as you shop ( as mentioned by the GP) now works well and doesn't check you each time so it's easy to do - particularly as you can use your bag as you go and don't need to repack when you check out.