Last Friday, a British tax court has ruled that Proctor & Gamble which manufactures and distributes Pringles will not have to pay a 17.5% Value Added Tax (VAT) because its potato crisps (as they are called in England) are well not really potato crisps. The court ruled on P&G's favor on the basis that the content of potato in a Pringles is less than 50%, its unusual shape and that they come in a tube. http://blogs.wsj.com/law/2008/07/07/in-big-win-for-pg-pringles-found-to-be-not-potato-crisps/)
So just to clarify. In England, french fries are chips and chips are crisps.
And yes, there are ketchup flavored potato crisps in England as well. So Britain hasn't totally gone to hell.