Sorry to hear that about the food making you ill.

I have never purchased any foodstuffs from a car boot, at my local boot sales it is not allowed due to health and safety grounds, by the sound of your experience this is a good policy to have.
I would recommend
never to buy food as with a bootsale there is no way to check the retailer, if purchased from your local supermarket or highstreet there are laws regarding food hygiene and sell by dates etc.
Its not worth getting a case food poisoning
