Layering is what gets a summer wardrobe through autumn. Done badly it just makes you look wider, with a shirt bunching under a jacket and two hems fighting over the same three centimetres.

The fixes are mostly mechanical. It is about thickness and length, not about taste.

Most people own eleven T-shirts and wear three of them. Not because the other eight are bad, but because they do not go with anything already in the wardrobe.

Colour is the thing that decides whether a tee gets worn or folded. It is worth more thought than it usually gets, and less than a mood board.