Marks and Spencer store with Christmas decorations
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How fashionable is an M&S cashmere onesie?

High Street retailer Marks and Spencer unveiled a cashmere onesie as part of their Christmas collection.

But how fashionable is it - and who would buy it?

The Today programme's Justin Webb spoke to TV fashion show presenter Trinny Woodall and Catherine Fuller from the London College of Fashion, who used to design luxury sleepwear.

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