Cardinal Vincent Nichols turns deeply earnest as he leans forward from his armchair to recalls an early encounter with human trafficking.

“The first person I met, who really shocked me,” he says, “was a blonde woman with blue eyes, white skin and was from England. She was cajoled into going to Italy supposedly with her boyfriend and then was held as a sex slave for the next 10 years.”

Cardinal Nichols has been on a learning curve since 2012 when police turned to the Church for assistance amid a surge of foreign women trafficking into the capital to work as prostitutes during the London Olympics.