soup to water
Personally I prefer thinner soups - botwinka and clear barszcz in Poland for example. I do think that British oxtail would go down well in Poland - there could be a market for that in the shops here. The same with British cullen skink - a heavier soup but one that Poles would like.
Weetabix and other American style cereals no. Not nice products and in any case the taste here would be for the sugary ones. One item that has appeared on the shelves here over the past few years is instant porridge in different flavours. Not something I'd buy, but instead of those little plastic pots, a canny housewife here with kids to feed and not much money or time might well buy Ready Brek.