Sex trafficking refers in practice to the recruitment, movement, harbouring or control of a person for the purpose of sexual exploitation, typically through force, threats, coercion, deception, abuse of vulnerability or payment to a person having control over the victim. It commonly involves prostitution, pornography or other forms of commercial sexual exploitation, and may occur domestically or across borders.In England and Wales and Northern Ireland, relevant conduct is principally criminalised under the Modern Slavery Act 2015 and related Sexual Offences Acts, which define trafficking for sexual exploitation as a specific form of human trafficking. In Scotland, comparable offences are contained in the Human Trafficking and Exploitation (Scotland) Act 2015 and sexual offences legislation. In Ireland, sex trafficking is addressed under the Criminal Law (Human Trafficking) Act 2008 (as amended) and prostitution-related offences.“Sex trafficking” is therefore a shorthand, descriptive term rather than a single, uniform statutory label, but across all four jurisdictions its core legal features are: exploitation for sexual purposes, lack of genuine consent, and improper means of control. It is central to criminal prosecutions, victim identification, immigration and asylum claims, and compensation and safeguarding frameworks.