Coincidence alert!
Tonight at the till, 10 minutes before the supermarket shut, I had all my shopping scanned by the assistant bagged up, ready to pay.
My credit card was not accepted by the machine, an error message could not read it's chip.
I keep a £20 cash float in my wallet, but my shopping was a lot more.
They would not let me swipe the card either.
So I ran to a cashpoint, it was down!
Thank G-D found another cashpoint, ran back to the supermarket, and paid 5 minutes before closing.
Lesson learned, will keep a larger cash float for supermarket visit, though not daily use as I do not like walking around with large amounts of cash.
I will also get a backup credit card, as I do not like taking a debit card out of the house. It is linked to the account my bills and mortgage come from, and I want to minimise risk on that account.