Former Wales captain and rugby commentator Eddie Butler has died aged 65, the BBC has announced.
The 16-cap Wales number eight died in his sleep on a charity trek on the Inca Trail in Peru.
The popular BBC commentator rose to prominence with Pontypool in the 1970s, representing Wales between 1980 and 1984.
Butler toured New Zealand with the British and Irish Lions in 1983, before forging a highly respected career as a commentator and broadcaster.
Sports Books of the Year: Conor Niland’s The Racket the best in a year dominated by autobiographies
Manchester City approach the surreal as they head for Liverpool
Mark Ella was ‘the fulcrum ... the genius’ of Australia’s trailblazing tour of 1984
Patrick Reed returns to winning ways despite worst warm-up
Charity Prostate Cymru, for whom Butler served as an ambassador, also shared the news.
“The Prostate Cymru charity is devastated by the passing of its much loved ambassador Eddie Butler,” read a statement.
“Eddie was the voice of Wales and we were honoured to have him as part of our charity. We will cherish the many memories we have of him.
“Over the last week Eddie once again showed his generosity and steadfast commitment to good causes by joining 25 Prostate Cymru fundraisers, including his daughter Nell, on the Inca Trail Trek to Machu Picchu.
“In the early hours of Thursday, September 15, Ed passed away peacefully in his sleep at Ecoinka base camp in the Peruvian Andes.
“He leaves behind his wife Susan and six children, who are very much in our thoughts.”
Butler represented Cambridge University from 1976 to 1978 while studying French and Spanish at Fitzwilliam College.
The imposing backrow forward made his Wales debut in the 18-9 win over France in January 1980.
After rugby Butler enjoyed a short stint as a teacher, then with a property development company before finding another niche in broadcasting.
Butler moved on from spells with national newspapers to excel for the BBC in commentary on rugby, but also adding colour to major sporting events, notably Olympic coverage.
Former England hooker Brian Moore paid tribute to his friend and BBC colleague on social media.
“I am devastated by this news,” Moore tweeted.
“Ed, I’m sorry I never told you how much I admired you as a broadcaster and as a man. Well, it wasn’t like that between us, was it.
“Condolences to Sue and your family. Sport has lost an iconic voice.
“I have lost a very dear friend. Goodbye Edward.”
