Immigration analysis: On 23 October 2024, the Supreme Court handed down its judgment in CAO v SSHD (Northern Ireland). In a unanimous decision delivered by Lord Sales and Dame Siobhan Keegan in a joint judgment, the Supreme Court allowed the SSHD's appeal, finding that the First-tier tribunal (FTT) committed no error of law when considering the respondents asylum application, had applied EHCR, art 8 properly and had regard to the best interests of the respondent’s daughter as a primary consideration, who the FTT were not satisfied would be subjected to female genital mutilation on return to Nigeria. The respondent complained that the SSHD had failed to comply with BCIA 2009, s 55(3) and the section 55 statutory guidance, after failing to refer to it in its decision letter to the respondent, and that the FTT erred in law by failing to take this into account. The court held that substantive compliance with the guidance is sufficient, and the SSHD had therefore not failed to comply. Regardless of whether the SSHD breached BCIA 2009, s 55(3), the court emphasises that it would not have affected the outcome of the appeal as the FTT's decision is a fresh determination which supersedes the decision of the SSHD and the duty to consider BCIA 2009, s 55(3) does not extend to the FTT. Rather, the basis of the FTT's obligation to have regard to the child’s best interest is ECHR, art 8. The court found that there was no inquisitorial or procedural requirement for the FTT to obtain more information about the child in this case, such as by directing that she be interviewed, but that there may be in other cases. Jennifer Blair, barrister in Lexis Nexis UK Immigration Practical Guidance, comments on the judgment.