The nature of the crime makes it difficult to provide an accurate assessment of the scale of the problem faced by the United Kingdom.
The latest estimate is that at any one time in 2003 there were up to 4,000 women in the UK who had been trafficked for the purpose of sexual exploitation. We have no estimate of the scale of trafficking for non sexual purposes. This estimate was part of an internal Home Office document on the social and economic costs of organised crime.
The United Kingdom Human Trafficking and the Serious Organised Crime Agency continue to improve our knowledge of this issue and the analysis of the outcomes of Operation Pentameter 2 will further inform this work.