'The Happiest Days of Your Life' is a tribute to how children remain children against the odds. The exhibition of photographs, taken by Ben Ingham is an intimate portrait of children's innate instinct to retain their childhood in some of the most troubled countries in the world. Commissioned by Save the Children, Ingham set off earlier this year with the remit to explore how vulnerable children in the developing world play and enjoy treats - two things fundamental to any childhood.