John Hume arrives for the funeral of the former Bishop of Derry, Dr Edward Daly, at St Eugene's Cathedral in the city four years ago. Getty Images
John Hume, the former Social Democratic and Labour Party leader and Nobel Peace Prize winner, died aged 83. Here he is pictured in 1969. Getty Images
In this file photo taken on May 19, 1998 showing Ulster Unionist leader David Trimble, left, and John Hume shaking hands on stage during a concert given by U2 in Belfast to campaign for a Yes vote for the Good Friday Agreement peace referendum in Northern Ireland. AFP
John Hume in buoyant mood on May 21, 1998, as he arrives for a breakfast meeting with then British prime minister Tony Blair and Ulster Unionist leader David Trimble at Dunadry Hotel to encourage a Yes vote for a Northern Ireland peace referendum. EPA
Tony Blair, centre, talks to the media after a meeting with David Trimble, left, and John Hume. AFP
In this March 17, 2000 photo, then US president Bill Clinton meets with Northern Ireland leaders Gerry Adams, John Hume and David Trimble at the White House in Washington. AFP
In this December 10, 1998 file photo, John Hume, right, looks at the Nobel Peace Prize diploma that he received from Francis Sejersted, left, chairman of the Norwegian Nobel Peace Prize Committee, during the award ceremony in Oslo Town Hall. AP Photo
John Hume arrives at No 10 Downing Street before talks with Tony Blair on the Northern Ireland Good Friday peace talks crisis. EPA
In this March 5, 2014 photo, Bill Clinton, right, walks with John Hume and his wife Pat across the Peace Bridge in Derry, Northern Ireland. AP Photo
Bill Clinton poses with John Hume at the Guildhall in Derry on the same day. AP Photo
John Hume arrives for the funeral of the former Bishop of Derry, Dr Edward Daly, at St Eugene's Cathedral in the city four years ago. Getty Images
John Hume, the former Social Democratic and Labour Party leader and Nobel Peace Prize winner, died aged 83. Here he is pictured in 1969. Getty Images
In this file photo taken on May 19, 1998 showing Ulster Unionist leader David Trimble, left, and John Hume shaking hands on stage during a concert given by U2 in Belfast to campaign for a Yes vote for the Good Friday Agreement peace referendum in Northern Ireland. AFP
John Hume in buoyant mood on May 21, 1998, as he arrives for a breakfast meeting with then British prime minister Tony Blair and Ulster Unionist leader David Trimble at Dunadry Hotel to encourage a Yes vote for a Northern Ireland peace referendum. EPA
Tony Blair, centre, talks to the media after a meeting with David Trimble, left, and John Hume. AFP
In this March 17, 2000 photo, then US president Bill Clinton meets with Northern Ireland leaders Gerry Adams, John Hume and David Trimble at the White House in Washington. AFP
In this December 10, 1998 file photo, John Hume, right, looks at the Nobel Peace Prize diploma that he received from Francis Sejersted, left, chairman of the Norwegian Nobel Peace Prize Committee, during the award ceremony in Oslo Town Hall. AP Photo
John Hume arrives at No 10 Downing Street before talks with Tony Blair on the Northern Ireland Good Friday peace talks crisis. EPA
In this March 5, 2014 photo, Bill Clinton, right, walks with John Hume and his wife Pat across the Peace Bridge in Derry, Northern Ireland. AP Photo
Bill Clinton poses with John Hume at the Guildhall in Derry on the same day. AP Photo
John Hume arrives for the funeral of the former Bishop of Derry, Dr Edward Daly, at St Eugene's Cathedral in the city four years ago. Getty Images