Former Liberal Democrat leader Lord Menzies Campbell has died at the age of 84.

Ming as he was widely known, led the Liberal Democrats from 2006 to 2007 and was the MP for North East Fife at Westminster for 28 years.

In his first career as a sprinter, he held the UK 100m record from 1967 to 1974 and ran in the 1964 Tokyo Olympics – being dubbed The Flying Scotsman.

Lib Dem leader Ed Davey described Campbell as “a dedicated public servant and a true Liberal giant”.

He said: “His principled leadership opposing the Iraq War was a mark of his morality, courage and wisdom.

“But more than that, he was an incredibly warm and caring friend and colleague. We will miss him terribly.”

Campbell died peacefully in London following a period of respite care. His grandson was with him.

His family said one of his final days was spent watching the Liberal Democrat conference, and enjoying watching video messages from political friends.

Campbell first stood as a Liberal Party candidate in 1974, but did not win his constituency until 1987.

He made his name as the party’s foreign affairs spokesman, a position he held for 14 years and was a renowned critic of the Iraq war.

He became a member of the House of Lords in 2015. His official title was Baron Campbell of Pittenweem.

Expressing his condolences, Scotland’s First Minister John Swinney said Campbell was one of the country’s most “well-liked political figures”.

He said Campbell was “a passionate believer in a better Scotland” but also a strong internationalist – keen to build consensus and find common ground.

Swinney said: “Those entering public service today could learn much from his style – always forthright in speaking up for what he believed in, but never anything other than respectful, courteous and polite to his political opponents.”

Scottish Liberal Democrat leader Alex Cole-Hamilton MSP said Campbell was one of the “most respected politicians of his generation”.

He said: “The first political thing I ever did was to deliver leaflets for Ming on the morning of his first election to Parliament in 1987.

“He was my MP, he was my mentor and he was my friend. From the Olympic track to the benches of Westminster, his contribution to public life will long be remembered.”

Sir Nick Clegg, who succeeded him as Liberal Democrat leader, said he had a great interest and expertise in foreign affairs.

He said he was quite “in step” with mainstream policy thinking in this area, which made his intervention on the Iraq war more impressive.

On a personal level, he said he visited him earlier this month in a nursing home and was struck by his “unlimited, unqualfied devotion” to his late wife Elspeth.

“He spoke about when they first met. It was quite wonderful. You could see him transported back to the first time he set eyes on her,” he told the BBC’s World at One.

Wendy Chamberlain, current MP for North East Fife, said Campbell “remained a significant figure” in the area.

She added: “His contributions to our communities, to the University of St Andrews, as well as to Scotland and the UK were immeasurable.

“Although he found the passing of his beloved Elspeth difficult, rather than retreat, until the last weeks of his life, he was still travelling to London to contribute in the House of Lords.”

Born Walter Menzies Campbell on 22 May 1941, Cambell was brought up in a Glasgow tenement.

He was educated at Hillhead High School and went on to the University of Glasgow, where he was a contemporary of both John Smith and Donald Dewar studying Law and debating in the union.

He also attended Stanford University in California during the Vietnam War and later became an advocate.

He was was called to the Scottish bar in 1968 and made a QC (latterly KC) in 1982. The law gave him a lucrative career and he continued to practise throughout his time in politics.

His wife of more than 50 years, Elspeth, died in June 2023 – he described her as his “constant political companion, always my encouragement and forever my first line of defence”.

The couple were married in June 1970, just three months after first meeting.

During his athletics career, Campbell captained the British men’s team at the 1966 Commonwealth Games in Jamaica.

A year later he set a new British 100m record of 10.2 seconds – beating a young OJ Simpson in the process. The record stood until 1972.

At one point he was known as “the fastest white man on the planet”.

Menzies Campbell’s contribution to our politics was far greater than his short spell as party leader suggests.

His was an extremely well informed voice on defence and foreign affairs which was central to the public debate during and after the Iraq war.

He and his late wife Elspeth were the best of political company with a great deal of insight into the Westminster issues and characters of the day.

In many ways Elspeth was more ambitious for her husband than he was for himself. His period as party leader was not a happy one.

He was on the receiving end of a persistent ageism – caricatured as a grandfatherly figure with his best days behind him when compared with rival leaders like Tony Blair and David Cameron.

When appearing on TV for interview he always insisted on wearing a tie because he felt it was what his constituents would expect.

But I knew he’d given in to modernising advisers who wrongly thought they could reinvent his image when one Sunday morning he appeared in our studio in an open-necked shirt. It was not long before he resigned.

It was his wisdom, experience and courtesy that were his greatest strengths and these were undervalued qualities during his time at the top.