This summer London will play host to an estimated 5 million visitors as the eyes of millions around the globe will be trained on the world’s top athletes at the 2012 Olympic Games. The Olympics are an opportunity for the citizens of the world to unite in celebration of the best of the human spirit: dedication and discipline, mutual understanding, fair play and solidarity.

But they also expose a darker side of human nature: for international sporting events and the large audiences they draw are also potential venues for the exploitation of the world’s most vulnerable citizens via the deplorable practice of human trafficking and modern day slavery.