Grocery shopping tip:
I use Google Keep for my shopping list. I have have attached a photo of my Tesco Clubcard (loyalty card) barcode to the shopping list note. When I've scanned all items at the self-service checkout and it asks for my clubcard, I hold the phone to the scanner and it reads the photo as if it were my clubcard, I then use my phone as contactless payment with Android Pay. Very quick, no need for cash, credit/debit cards or loyalty cards.
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