Ghanian-British photographer James Barnor says he is proud of his documentation of Ghana's history.

The 92-year-old captured photos during Ghana's independence and has seen several different administrations come to power.

"I have recorded a lot of changes in people, in life, in politics, in governance," he told the BBC's Focus on Africa programme.

He remembers photographing Ghana's founding father Kwame Nkrumah during independence.

"If I hadn't capture those things they would have been lost so today I'm happy I made some contribution," he said.

The photographer captures his life in the UK in his new exhibition at the Serpentine Gallery in the Kensington Royal park entitled James Barnor/Accra/London - a Retrospective.

This fascinating history drawn from his huge archive focuses on the decades 1950-80 - the pinnacle of his career.

His 32,000-image archive was recently digitised, allowing him to revisit his pictures with fresh eyes.