New data released by the Home Office has brought to light discrepancies in how the ages of asylum seekers arriving in the UK are assessed, raising concerns about potential vulnerabilities in the immigration system and the need for more robust border controls. The data reveals a notable difference between the age assessments made by immigration officers and those conducted by local authority social workers, prompting calls for a more standardized and rigorous process to prevent abuse of the system.

The Home Office data shows that between July 2025 and March 2026, immigration officials assessed 4,320 new arrivals, determining that 1,363 (32%) were children. In contrast, local authority social workers assessed 3,102 individuals during the same period, identifying 1,198 (68%) as children. This disparity has sparked debate about the accuracy and reliability of the initial assessments conducted by immigration officers, who often work under pressure and with limited resources.

The Home Office acknowledges that initial assessments are conducted “at pace” and with incomplete information. This raises questions about the effectiveness of these assessments in accurately determining the age of asylum seekers, particularly in cases where individuals lack proper documentation. The lack of documentation is frequent among asylum seekers from regions such as Afghanistan, Sudan, and Eritrea, where conflict and instability have disrupted civil registration systems.

Critics argue that some adult asylum seekers may attempt to exploit the system by falsely claiming to be children in order to gain preferential treatment, access to education, and avoid deportation. Concerns have also been raised about the potential security risks associated with allowing adults to be housed with vulnerable children. The Home Office has established a National Age Assessment Board (NAAB) with in-house social workers to conduct age assessments of disputed cases, and is considering strengthening the weight given to these assessments. This move is seen by some as an attempt to improve the accuracy and consistency of age assessments and to address concerns about potential abuse of the system.

The Home Office's reliance on visual assessments of “appearance and demeanor” has also come under scrutiny. While these assessments may be necessary in the absence of documentation, critics argue that they are subjective and prone to error. A report from the independent chief inspector of borders and immigration highlighted concerns about the Home Office’s reliance on these “perfunctory visual assessments,” which often rely on generic physical characteristics and can pressure young people into falsely declaring themselves as adults.