One of West Africa’s most prolific photographers, Sanlé Sory (b.1943, Burkina Faso) took more than a million portraits, over seven decades, showing the profound social and political changes in Burkina Faso. Colour Years captures a lesser-known chapter of his career.

The Photographers' Gallery's curator, Taous Dahmani, leads an informal tour where participants can find out more about the photographer and his work.