Not sure if they have them in the UK or not. I bought mine at amazon. You can learn about them at www.popchips.com
. My teenage son liked to have Lays and I found these and thought he could still have the crunch and saltiness of a chip but that these would be a bit healthier.
I am sorry you do not feel good.
Hopefully you are able to get to bed and wake feeling 100% better.