Legislation – Illegal Migration Act 2023
Changes to legislation:
Illegal Migration Act 2023, Section 48 is up to date with all changes known to be in force on or before 23 October 2025. There are changes that may be brought into force at a future date. Changes that have been made appear in the content and are referenced with annotations.

Changes to Legislation
Revised legislation carried on this site may not be fully up to date. Changes and effects are recorded by our editorial team in lists which can be found in the ‘Changes to Legislation’ area. Where those effects have yet to be applied to the text of the legislation by the editorial team they are also listed alongside the legislation in the affected provisions. Use the ‘more’ link to open the changes and effects relevant to the provision you are viewing.
Changes and effects yet to be applied to Section 48:
- s. 48(2)–(7) applied (with modifications) by 1997 c. 68, s. 2AA(2)(3) (as inserted) by 2023 c. 37 s. 53(5)
Legal proceedings
48Upper Tribunal consideration of new matters
(1)
This section applies where the Upper Tribunal is considering—
(b)
(2)
The Upper Tribunal may consider any matter which it considers relevant to the substance of the decision.
(3)
But the Upper Tribunal must not consider a new matter unless the condition in subsection (5) is met.
(4)
A matter is a “new matter” if—
(a)
it is raised by the person in the course of the appeal or application, and
(5)
The condition in this subsection is that—
(a)
within the relevant period the Secretary of State has given the Upper Tribunal consent to consider the new matter, or
(b)
where the Secretary of State has not given such consent within the relevant period, the Upper Tribunal determines that there were compelling reasons for the person not to have provided details of the matter to the Secretary of State before the end of the claim period.
(6)
(7)
In subsection (5) “relevant period” means the period of 3 working days beginning with the day after the day on which the new matter is raised by the person in the course of the appeal or application.
(8)
(9)
See also section 51 (finality of certain decisions by the Upper Tribunal).