"People for sale, two for twenty pounds, more coming in tomorrow," was the chant on Oxford Street during a dramatic representation based on real life stories of victims of modern slavery.
Eight people were offered on sale to passing members of the public and information was given to shoppers and office workers on how to spot the signs that someone is being trafficked and what they can do to help.
The Salvation Army was appointed by the Government in July 2011 to provide support services to adult victims of modern slavery and human trafficking in England and Wales.
Since then The Salvation Army and its partners have supported nearly 3,000 victims of modern slavery to help these vulnerable people set out along the long path to recovering from these crimes.
The charity said most of the people who stopped did not realise people still lived in slave-like conditions in the UK today.
One passer-by who congratulated the team on their efforts to raise awareness was a survivor of modern slavery from the Czech Republic.
The Salvation Army's Director of Anti Trafficking and Modern Slavery, Major Anne Read said: "There are many people who still don't realise that human trafficking is taking place all around us; in our local communities; perhaps round the corner from where they live and that they can play a role in stamping it out.
"The Salvation Army wants to help people understand what to look for and what support is available. It is vital that nominated first responders, members of the public and victims themselves are reassured that there is an effective, secure system to support victims the moment they gain freedom from their traffickers."