Taking of hostages describes the unlawful seizing, detaining or holding of a person, combined with a threat to kill, injure or continue to detain them in order to compel a third party (such as a state, organisation or individual) to act, refrain from acting, or make a concession.Across the UK and Ireland, the concept is closely aligned with the offence of hostage‑taking under international and domestic terrorism and criminal legislation. In the UK, the Taking of Hostages Act 1982 implements the International Convention Against the Taking of Hostages, creating an offence applicable in England and Wales, Scotland and Northern Ireland, including extra‑territorial conduct. In Ireland, analogous conduct is typically prosecuted under offences involving false imprisonment, kidnapping, extortion and terrorism legislation.Key legal features include absence of consent, use or threat of force, coercive purpose, and the leveraging of a victim’s liberty as a bargaining tool. In practice, the term is used in terrorism cases, organised crime, piracy, prison disturbances and armed conflict, and is relevant to issues of jurisdiction, extradition, mutual legal assistance, state responsibility and compliance with international humanitarian and human rights law.