In practice, this describes the Home Office enforcing the removal of a non‑British citizen who has no lawful permission to be in the UK (for example, an illegal entrant, an overstayer, or someone whose leave has been curtailed), by setting removal directions through an immigration officer. It is an administrative measure, distinct from deportation.
The present statutory framework is found principally in the Immigration Act 1971 (as amended by the Immigration Acts 2014 and 2016), including Schedule 2 powers on removal and detention. The former power in the Immigration and Asylum Act 1999, section 10, has been repealed. In practice, the process typically involves service of a notice of liability to removal, the fixing of removal directions, possible immigration detention and consideration of Home Office bail. Individuals may raise protection or human rights claims; where a suspensive right of appeal applies, removal is stayed, otherwise challenges are commonly brought by judicial review.
Dependent family members can be removed on the same notice. Removal is usually to the person’s country of nationality or another state willing to receive them.
Usage is consistent across England & Wales, Scotland and Northern Ireland. It does not apply in Ireland, which has separate removal and deportation regimes.