It may be 200 years since slavery was abolished by UK parliament, but the shocking fact is that in many parts of the world there are more slaves than ever before.
Photojournalist Pete Pattisson presents a selection of photographs tracing his personal journey through the contemporary forms of enslavement that are still in existence in India, Burma, Ghana and Haiti.
In India alone there are estimated to be as many as 22 million slaves,more than the combined figure for the rest of the world.
The majority are bonded labourers,enslaved to a landlord or contractor for their lives, and in many cases the lives of generations to come.
In collaboration with Anti-Slavery International, founded in 1839 by the abolitionists who led Britain's campaign against the Slave Trade in 1807 and fought for the abolition of slavery in 1833.