A Herald investigation has found that five men from a single Ranfurly Shield-winning rugby team have been diagnosed with dementia. As doctors see growing signs, a former player working with sufferers says he doesn't need conclusive proof.

RUGBY AND DEMENTIA SERIES - OVERVIEW

While top UK neurologists and other medical experts are increasingly seeing persuasive signs of a link between rugby and dementia, one former Lion has no doubt the connection is real.