Research
Policy & legal framework
Return to the Migration Glossary Table of Contents The laws, rules, and policies that govern the UK immigration system, from primary legislation to operational guidance. Immigration Rules The detailed legal framework, laid before Parliament by the Home Secretary, governing who may enter and remain in the UK and under what
Institutions & bodies
Return to the Migration Glossary Table of Contents The government departments, agencies, courts, and advisory bodies responsible for managing and scrutinising immigration in the UK. Home Office The UK government department responsible for immigration, border security, policing, and counter-terrorism. Within immigration, it includes UK Visas and Immigration, Immigration Enforcement, and
Statistics & measurement
Return to the Migration Glossary Table of Contents The data sources, definitions, and methods used to count and track migration flows and the migrant population. Net migration The difference between the number of people arriving in the UK to live (immigration) and the number leaving (emigration), over a given period.
Irregular migration
Return to the Migration Glossary Table of Contents Migration that takes place outside legal channels, including Channel crossings, clandestine entry, overstaying, and people smuggling. Irregular migration / unauthorised migration Migration that takes place outside official, legal channels. In the UK context, it includes clandestine entry, Channel crossings in small boats,
Enforcement, returns & removals
Return to the Migration Glossary Table of Contents The powers and processes used to enforce immigration law and remove people with no right to remain. Enforced removal The compulsory return of a person to their country of origin or a safe third country by the Home Office, against their will.
Asylum system
Return to the Migration Glossary The process by which people fleeing persecution claim protection in the UK, from initial application through decision and appeal. Table of Contents Asylum claim / application A formal request made to the Home Office by a person seeking protection in the UK on the grounds
Explore Further

Media
Watch our most recent broadcast appearances, interviews, and briefings, where we comment on immigration, population growth, and related policy issues. These videos offer timely, expert insight and considered responses to current developments in the public and political debate.

Blogs
We publish blogs that draw on data and research, and through them we inform debate, spark discussion, and explore the wider implications of current developments.

Statistics
Migration Watch UK monitors and analyses official immigration and population statistics. We chart trends, report key developments, and provide clear, accessible insights to help understand migration and its impact on the UK.