YC, R (on the application of) v Secretary of State for The Home Department

An implied administrative power under the Immigration Act 1971 permits the Secretary of State to withdraw a favourable grant of leave communicated by an obvious clerical or administrative error, including an erroneous grant of indefinite leave to remain. The error must be reasonably apparent to the beneficiary, and correction must be prompt. The power is incidental to the statutory immigration-control scheme, not a substantive extension of the express revocation powers in section 76 of the Nationality, Immigration and Asylum Act 2002. It remains subject to public-law constraints, including legality, fairness, rationality and Convention rights, and must be exercised sparingly where status and third-party interests are affected. The power does not authorise retrospective cancellation. A corrected grant takes effect when properly notified.

YC, a Chinese national and recognised trafficking victim, applied for asylum and other forms of leave. The Home Office intended to grant limited leave to remain but sent a letter stating that he had been granted indefinite leave to remain after using the wrong template. After YC’s representatives queried the inconsistent biometric residence permit, the Secretary of State issued a revised, purportedly backdated letter granting limited leave.

The Upper Tribunal dismissed YC’s judicial review claim on 12 March 2025, holding that an implied power existed to correct the administrative error. The appeal concerned whether that action was an impermissible revocation or retrospective cancellation of ILR, or an incidental power to correct the decision actually intended.

1. Appeal dismissed by majority. Cobb LJ delivered the leading judgment, with which Dingemans SPT agreed. Laing LJ dissented from the reasoning.
2. The first letter was properly construed as a valid grant of ILR, although it resulted from a clerical error. The Secretary of State nevertheless had an implied administrative power under the Immigration Act 1971 to withdraw and correct a favourable grant of leave where the notified decision resulted from an obvious administrative mistake.
3. The power was incidental to the statutory scheme and ensured that a written notice communicated the decision actually intended. The absence of an express provision did not prevent the implication of that power. Section 76 of the Nationality, Immigration and Asylum Act 2002 was not a complete code preventing correction of an erroneous grant. Its express revocation provisions concerned different circumstances, including deception or other events following an intentional grant.
4. The power was narrow. The mistake had to be obvious and reasonably apparent to the beneficiary, and correction had to be prompt. Withdrawal remained subject to public-law constraints, including legality, rationality, fairness, Convention rights and the rights of others. It was exceptional and required particular caution where a favourable decision had affected settled expectations or third parties.
5. The power did not authorise retrospective cancellation or revocation. The Secretary of State’s attempt to treat the second letter as retrospectively replacing the first was unlawful in that respect. However, the correct position was effectively notified on 22 December 2023, from which date YC had an effective grant of LLR.
6. The immigration authorities concerning mistaken grants, including Ram and Hashmi, addressed the validity or status of such grants and did not exclude a later corrective power. The public-law authorities supported a limited power to correct obvious errors.
7. Laing LJ considered that the statutory scheme for ILR was a complete code. In her view, an incidental administrative power could not revoke an effective grant outside section 76, and the grant would subsist unless quashed by a court. That dissent did not alter the majority disposition.

1. Court of Appeal (Civil Division) dismissed the appeal on 16 March 2026: [2026] EWCA Civ 285.
2. Upper Tribunal (Immigration and Asylum Chamber), Mr Justice Bourne and Upper Tribunal Judge Loughran, dismissed YC’s judicial review claim on 12 March 2025.