The High Court has ruled that Pringles are not potato crisps. The delicious and addictive snacks are only 42 per cent potato and the judge decided that they were not therefore “wholly, or substantially wholly, made from the potato.”

The importance of this is that, as a result, Pringles are zero-rated for Value Added Tax – and thus cheaper. Hurrah!

NB: the Pringle is in the shape of a hyperbolic paraboloid. Now you know.