The UK and Australia each have a strong mechanism for reviewing the necessity, proportionality and operation of national security laws, although the latter has more explicit statutory basis and powers. After each office escaped abolition, their continuing role now seems clear, indeed the Republic of Ireland recently introduced a bill for an Independent Examiner of Security Legislation, drawing on elements of each model.
Blackbourn, J. (2021). Mechanisms for Reviewing and Monitoring National Security Laws: the UK and Australia Compared. Australian Law Journal, 95(10), 786-797. https://doi.org/10.3316/agis.20211105056428