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Why do snooker players wear waistcoats?

<span>Photograph: Visual China Group/Getty Images</span>
Photograph: Visual China Group/Getty Images

While watching Ronnie O’Sullivan defeat Ding Junhui last week to become the oldest winner of the UK Championship, it struck me that snooker’s dress code – usually a black waistcoat over a white shirt, paired with a black bow tie – is oddly formal. Even darts players wear polo shirts. When did this outfit become standard attire, and why does it persist? Simon Byatt, York

Post your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday.