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UK-Built Tool Flags Trafficking Risks in Online Sex Ads as Police Report Arrests

Developed at the University of Sheffield with global partners, STIM rates adult‑service adverts to help investigators focus on those at highest risk.

Overview

  • Thames Valley Police say scoring more than 128 adverts led to 40 visits, dozens of people safeguarded, multiple arrests and five live investigations.
  • Sixteen UK police forces and two charities have adopted the STIM, alongside four agencies overseas and Denmark’s Centre Against Human Trafficking.
  • The system analyses advert photos, language and other details to assign low, medium or high risk ratings that guide operational priorities and support.
  • Police cite the tool’s value because victims rarely self‑report, noting it helps identify those most at risk and set timeframes for action.
  • Project leaders report 30 training sessions for over 100 police representatives, with ongoing updates based on feedback from users.