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I'll be surprised if the daughter gets a dress for £60, but she is of an age where she does do that. She's not one to regard the Derby or Ascot as a fashion show; last year, on the way to the Derby, she changed trains at Clapham Junction just so she could find a cheap hat. I have only once bought her 'classic', and it was , literally, the little black dress.
Fashion will always come around. At the Oaks ("Ladies Day") there was a lot of polka dot, full skirt, tight waist, dresses that belonged in the mid-1950s. All they needed was bobby sox !