In 1959 a small group of activists banded together to campaign against the regime of apartheid in South Africa.
The group, which started in the UK, grew into the huge and influential Anti-Apartheid Movement.
Its members included some of the foremost young politicians, artists and activists of their day.
Former leading lights of the group have come together to celebrate 50 years since the formation of the movement, at the opening of a new exhibition marking the half-century of campaigning called "Forward to Freedom".
The BBC's Audrey Tinline went to the Museum of London to meet veteran campaigners, both of them former British MPs: Bob Hughes, now Lord Hughes, previous chair of the movement and David Steel, now Lord Steel, who remembers the early days of anti-apartheid activism in the UK.
First broadcast 12 June 2009