That's interesting JRC. I havn't heard of Pentameter before, but here's a quote from the Guardian:
"The UK's biggest ever investigation of sex trafficking failed to find a single person who had forced anybody into prostitution in spite of hundreds of raids on sex workers in a six-month campaign by government departments, specialist agencies and every police force in the country.
The failure has been disclosed by a Guardian investigation which also suggests that the scale of and nature of sex trafficking into the UK has been exaggerated by politicians and media.
Current and former ministers have claimed that thousands of women have been imported into the UK and forced to work as sex slaves, but most of these statements were either based on distortions of quoted sources or fabrications without any source at all."