30th March 1971: Welsh national rugby team's full back, J P R Williams, selected for the British Lions tour of Australia and New Zealand, stretching his calf muscles on the pitch. (Photo by Central Press/Getty Images)
30th March 1971: Welsh national rugby team's full back, J P R Williams, selected for the British Lions tour of Australia and New Zealand, stretching his calf muscles on the pitch. (Photo by Central Press/Getty Images)