17:00 - 17:40
Geoff Watts asks why the source of new medical drugs is drying up.
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31 May 2012
Clare walks with members of the Tavistock-Dartmoor Search and Rescue Team, and their dogs.
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Series 21, Flamborough Head to Bridlington
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Clare Balding meets Stuart and his dog Poppy, walking round England for charity.
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