Former Prime Minister Gordon Brown, who was at the memorial service, has said that South Africans see Nelson Mandela as "not just a president but as a friend".
He told ITV News that it was a "privilege" to work with Mandela, adding that he "teaches us that nothing is impossible, as long as you have hope".
Pictures released today give a unique look inside Air Force One as two former and one current US President flew to Nelson Mandela's memorial
Twenty years ago the soon to be President Mandela pledged to 'wash away the stains of apartheid' - two decades on those stains remain.
Barack Obama has led the tributes to Nelson Mandela saying that South Africa's democracy is his 'cherished legacy.'