Respected veteran journalist Mark Colvin has written his own Twitter epitaph, with his @Colvinius account tweeting: “It’s all been bloody marvellous”, after his death on Friday at the age of 65.

The ABC broadcaster, a self-proclaimed “Lifetime Lance-Corporal in the Awkward Squad”, was a prolific Twitter user with more than 103,000 followers.

He died on Friday after struggling for more than 20 years with a rare auto-immune disease which he contracted while covering the genocide in Rwanda in the 1990s.

Among Australian journalism’s most authoritative voices, and a master interviewer with a depth of knowledge in world affairs, Colvin held a number of overseas postings with the ABC, working as a correspondent in Europe and Africa.

His award-winning career with the ABC spanned more than four decades, and for the last 20 years he was a familiar voice as the presenter of ABC radio’s current affairs program PM.

He also took to the digital world with great enthusiasm as a prolific contributor to the Twittersphere under the handle @Colvinius.

“Today we lost our beloved Mark,” Colvin’s family said in a statement on Friday.

“The family would like to thank the doctors and nurses at the Prince of Wales hospital, as well as the community, the ABC, his friends and colleagues, who have stood by him and supported his career and life.”

They asked mourners to donate to the Prince of Wales Hospital trust in lieu of flowers.

ABC Managing Director Michelle Guthrie said: “For many Australians, Mark’s steady and measured voice as host of PM brought them the essential news of the day and kept them informed about events of national and international importance.

“We will miss him enormously, and extend our thoughts to his family and friends.”

ABC News Director Gaven Morris described Colvin as “one of Australia’s finest journalists, admired and respected by his workmates and audiences alike for his intellect, wit and absolute integrity”.

Rare disease contracted in Rwanda

Mark Colvin was working in Rwanda when he fell ill. Photo: Supplied/ABC News

In his ABC News report at the time he said:

“The degree of death and suffering was absolutely extraordinary … there were fields of people lying in their own excrement and vomit … people dying of cholera and typhoid and I don’t know what else.”

Colvin fell gravely ill on his return to London, suffering from severe fluid build-up and kidney failure.

He recovered after a long stint in hospital, but his kidneys were permanently damaged and a side-effect from treatment meant he had to have both hips replaced.

After spending three years on dialysis, Colvin had a kidney transplant in 2013 after meeting his donor on the job during an interview about the News of the World phone-hacking scandal.

Prominent business adviser Mary-Ellen Field had been accused of giving journalists personal information about one of her clients, supermodel Elle McPherson.

A friendship was born between the interviewer and interviewee and, when the time came, Ms Field donated a kidney to Colvin.

Colvin with Mary-Ellen Field. Photo: Supplied/ABC News

“It’s wonderful. I don’t have to go to dialysis three days a week,” Colvin said after the transplant.

“And I don’t have to go through that rollercoaster of slowly being poisoned by your own body.”

The extraordinary story surrounding the kidney donation became the subject of a play.

An unusual childhood, father was a globe-trotting British spy

Colvin grew up in an unorthodox family, with his father serving as a Cold War-era spy for MI6 while working as a British diplomat.

He turned his experiences into a memoir, titled Light and Shadow: Memoirs of a Spy’s Son, and published the year before his death.

He lamented that despite his father’s colourful career — during World War II he had been infiltrated into Vietnam on board a midget submarine to run a resistance network against the Japanese — “I could never get him to record an interview, even one embargoed till after his death”.

After graduating from Oxford University with a BA (Honours) in English, Colvin moved to Australia in 1974, and joined ABC Radio News as a cadet the next year. He went on to become one of the founding presenters at 2JJ, now Triple J, where he spent three years presenting the news and conducting interviews, as well as producing current affairs and documentary specials.

Colvin became the ABC’s London correspondent aged just 28. Photo: Supplied/ABC News

In 1980, at the age of 28, he was appointed the ABC’s London correspondent. It was a turbulent time, and saw him covering the Iran hostage crisis, the dying throes of the Cold War, and the Gorbachev era which saw the Iron Curtain finally dismantled as the Berlin Wall came down and Eastern Europe emerged from decades of Communist rule.

From 1988 to 1992, Colvin was a reporter for Four Corners, winning a Gold Medal at the New York Film Festival for a film on the Ethiopian famine.

In 1992 he was posted to London as TV Current Affairs correspondent, mainly reporting for Foreign Correspondent, 7.30 and Lateline.

He returned home to Australia in 1997 to present PM.

Mark Colvin is survived by two sons, William and Nicolas.