Undocumented Migrants: Age Assurance

The Home Office publishes data on asylum in the ‘asylum detailed datasets’ as part of the ‘Immigration System Statistics Quarterly Release’.

Data on asylum claims by route of entry to the UK is published in table Asy_D01a and data on initial decisions on asylum claims is published in table Asy_D02. Additional data on the age of unaccompanied asylum-seeking children (UASC) is published in table Asy_01a of the ‘asylum summary tables’. The latest data relates to the year ending June 2025. For further information on the data, see the notes pages of the tables.

Data on asylum seekers in receipt of support, by support type at the end of each quarter, is published in table Asy_D09. The latest data relates to as at 30 June 2025.

Data on the outcomes of asylum appeals is published in table Asy_D07; the latest data relates to the year ending March 2023. Data on age disputes is published in table Asy_D05; the latest data relates to the year ending June 2024. Appeals and age assessment data is currently unavailable due to ongoing work on a new case working system. Updated data will be included in a future edition of the Immigration System Statistics release.