I live in west London. Coke, especially Coke Zero seems to have a vinegar like after taste. I also had some potatoes and it had the same so I’m not sure if I’m going mad now. But coke ALWAYS has a vinergarette after taste now it’s become too strong and I actually threw a way a can that was 75% full because I couldn’t bare it. I don’t like food waste so that is saying a lot. Is that an underlying issue or has anyone experienced the same? Can someone try it and let me know!!! I’ve had about 4 cokes maybe 7 maximum in the past three months and I’ve noticed it everytime. I had shweeps watermelon mixer and it was fine.