Britain's National Crime Agency identified 2,744 people, including 602 children, as potential victims of human trafficking in 2013, with more than 40 percent ending up in the sex trade and almost 30 percent forced into manual labor, according to Reuters.
The number of people locked in slavery in Britain rose by 22 percent last year, with online dating, social media sites and Internet job advertisements used increasingly to recruit victims, the report released on Tuesday said.
The NCA, Britain's equivalent of the U.S. Federal Bureau of Investigation, came into operation last October with the aim of better coordinating police action on issues such as child sex abuse and organised crime, Reuters reported.
Almost 30 million people are enslaved worldwide, trafficked into brothels, forced into manual labour, victims of debt bondage or born into servitude, according to rights group Walk Free Foundation that produces the Global Slavery Index, according to Reuters. It estimated that between 4,200 and 4,600 are enslaved in the United Kingdom.
Although the number of victims of slavery in Britain is hard to pin down, studies have shown there has been an increase in human trafficking in recent years, prompting the government to prepare a bill to more effectively tackle slavery offences, Reuters reported.
Karen Bradley, who was appointed modern slavery and organized crime minister earlier this year, described modern slavery as an appalling crime that has "no place in today's society," according to Reuters.
"Yet these figures show it is taking place here - often out of sight - in shops, fields, building sites and behind the curtains of ordinary streets," Bradley said in a statement as the NCA report was released, Reuters reported.
The NCA report found 41 percent of victims identified in Britain last year were trafficked for sexual exploitation, up from 35 percent a year earlier, while the number of those forced into manual labour rose to 27 percent from 22 percent in 2012, according to Reuters.
Another shift was also the number of victims from Thailand which jumped to 89 from nine a year earlier, making it one of the 10 countries with the largest numbers trafficked to Britain, Reuters reported
