A charity single highlighting the plight of modern day slaves is set to be an unlikely hit less than a week after it was released.

Twenty Seven Million, by Matt Redman and Manchester hip-hop outfit LZ7 is performing well, according to mid-week sales figures in the UK.

The single’s been released in support of the A21 Campaign which aims to prevent human trafficking and prosecute traffickers.

It faces competition for the top spot from Dappy and Gotye