A window display at Prada's Bond Street store in London. Prada posted an 18 per cent rise in sales in the nine months to the end of September.  Getty Images
A window display at Prada's Bond Street store in London. Prada posted an 18 per cent rise in sales in the nine months to the end of September. Getty Images

Prada is a luxury goods star but it's a devil of a time for the rest