UK-wide MoD Police tribunals fixed by new SI on 28 Dec

If you work with the Ministry of Defence Police or you teach public law, here’s a timely update. A fresh Statutory Instrument tidies up the MDP’s conduct, performance and appeals rules after an error in an earlier 2025 update. It applies across the UK and takes effect on 28 December 2025, according to the instrument’s front page on legislation.gov.uk.

First, a quick explainer. A Statutory Instrument (or SI) is a legal tool ministers use to make detailed rules under powers granted by an Act of Parliament. SIs are part of “secondary legislation” and are usually short documents that set out precise textual changes to existing law, subject to parliamentary procedures. Think of an SI as the instruction sheet that makes an Act work day to day.

So what went wrong-and how is it fixed? The Ministry of Defence Police updated its 2020 regulations earlier this month via SI 2025/1263. A defect was then identified. The new instrument-SI 2025/1360-remedies that defect and, following long‑standing government practice, is being issued free of charge to everyone who received the faulty SI. That “free issue” formula is standard when departments correct drafting errors.

What exactly changes? The new SI largely rolls back the earlier amending SI. In plain language, most of the 2025 tweaks to the MDP Conduct Regulations, their modifications for former officers, and the Performance and Appeals Tribunals provisions are revoked. Only a limited change remains: the amendment linked to Scotland’s appeals arrangements stays in place, and the definition of “Head of HR” is preserved. The rest of Parts 2, 3 and 4, regulations 72 and 73, regulation 75 apart from that definition, and regulations 76 and 77(1)–(2) of the earlier SI are revoked.

Who does this affect? You, if you are an MDP officer, a former officer involved in a conduct case, or a manager or HR lead handling discipline or performance. Because the MDP polices defence sites across the UK, the rules extend to England and Wales, Scotland and Northern Ireland, mirroring the force’s UK‑wide remit set out in its 2020 framework. In short: check which version of the rules applies to your case as of 28 December.

Why is Scotland mentioned? Separate Scottish regulations are moving police appeals onto the First‑tier Tribunal for Scotland from 29 December 2025 and revoking the older Police Appeals Tribunal rules. The MDP appeals framework needed a light update so it still works alongside those changes. That is the small part of the earlier SI that survives in the new one.

Key dates help you teach or brief colleagues clearly. The corrective SI was made on 18 December 2025, laid before Parliament on 23 December, and comes into force on 28 December. It is signed by the Minister of State at the Ministry of Defence. For context, the current post‑holder (Lord Coaker) has ministerial responsibility that includes the Ministry of Defence Police.

What this means if you’re handling a live case: expect the underlying 2020 Regulations to continue without most of the December 2025 alterations. Where you relied on the short‑lived 2025 wording, check whether the surviving Scotland‑related tribunal amendment or the “Head of HR” definition is relevant; otherwise the position reverts. When in doubt, read the commencement and revocation notes first, then the Schedules.

What this shows for students and new practitioners is how secondary legislation is corrected in public. The “free issue” line you’ll see at the top of the instrument is there for transparency and to ensure anyone who received the defective version gets the replacement without paying-a small but important accountability habit worth spotting in class.

If you want to read this confidently, take it step by step. Start with the citation, extent and commencement to locate when and where the law applies. Move next to the revocation provisions to see what is switched off. Finally, scan any notes that explain why changes are made. This method works across SIs and will help you teach or apply them with fewer surprises, including in the MDP context.