Britain's Adam Peaty sets a 50m breaststroke world record for the second time in a day, becoming the first person to break the 26-second mark.
Items from the controversial Victorian conflict were kept by former police officer Robert Oliver.
The rare and historical medals badge, found in Derbyshire, was estimated to fetch up to £2,000.
A year on from Mia Ayliffe-Chung's death, her mother is fighting to end "slave labour" conditions for backpackers in Australia.
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Listen to live BBC local radio commentary of Derbyshire against Lancashire in the T20 Blast.
Great Britain's Adam Peaty retains his 100m World Championship breaststroke title and Ben Proud wins 50m butterfly gold.
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