I was in London's East End until I was 18, and remember sometimes having bread and dripping.
To add to the list of unpleasant (to many) food: jellied eels. I don't like anything jellied, let alone something slimy like an eel.
In an Aberdeen b-and-b, an Oriental gentleman and I were the only people breakfasting. When he asked me what one item on his plate was, I played safe and pretended I didn't know, as it was black pudding and he might not have appreciated knowing its main ingredient.