Enshrine Ministerial Code in Legislation

Equal treatment & democratic rights — Helps

moderate · moderate confidence

Making the Ministerial Code a legal requirement and giving Parliament a say in appointing an independent investigator would strengthen due process and the rule of law over those in power. The main caveat is that recent reforms have already partly addressed the problem, and key decisions on sanctions would likely remain with the Prime Minister.

The evidence

• The Ministerial Code currently operates as a document published by the Prime Minister, who also acts as its ultimate arbiter. — gov.uk (media) — “The Ministerial Code currently functions as a document setting out standards of conduct for government ministers, published by the Prime Minister, who also acts as its ultimate arbiter”
• Historically the Adviser needed the Prime Minister's consent to begin investigations. — transparency.org.uk (media) — “Historically, the Adviser required the Prime Minister's consent to initiate investigations into alleged breaches”
• Recent reforms in 2024 and 2026 have already given the Adviser power to initiate investigations without prior Prime Ministerial approval. — transparency.org.uk (media) — “recent reforms implemented in November 2024 and March 2026 have empowered the Adviser to initiate their own investigations without the Prime Minister's prior approval”
• The Adviser is still appointed by the Prime Minister. — assets.publishing.service.gov.uk (government) — “the Adviser is still appointed by the Prime Minister”
• The ultimate decision on consequences for a breach traditionally remains with the Prime Minister. — assets.publishing.service.gov.uk (government) — “while they can advise on sanctions, the ultimate decision on consequences for a breach traditionally remains with the Prime Minister”
• 40 potential breaches of the Ministerial Code were not investigated between January 2017 and November 2022. — transparency.org.uk (media) — “40 potential breaches of the Ministerial Code were not investigated between January 2017 and November 2022”
• Transparency International UK and the Institute for Government argue that making the Code statutory and the Adviser truly independent would provide a stronger framework for upholding standards. — transparency.org.uk (media) — “Transparency International UK and the Institute for Government (IfG) argue that making the Code statutory and the Adviser truly independent would provide a stronger framework for upholding standards, thereby rebuilding t…”
• Statutory footing could make the Code susceptible to judicial review. — ukconstitutionallaw.org (media) — “Legal scholars like Mike Gordon suggest that enshrining the Code in statute could make its application susceptible to judicial review, even if only for certain provisions”
• The Committee on Standards in Public Life recommended that a requirement to issue the Ministerial Code be enshrined in primary legislation. — ukconstitutionallaw.org (media) — “it recommended that a requirement for the Prime Minister to issue the Ministerial Code be enshrined in primary legislation”
• The UCL Constitution Unit stressed the importance of legislation to underpin independence of constitutional watchdogs, noting no change in the appointment method under current reforms. — blogs.ucl.ac.uk (academic) — “there is no mention of any change in the method of appointing the Adviser, which is made without open competition and is outside the Public Appointments Code”
• Placing the Code on a statutory footing and making the Adviser's appointment parliamentary would significantly curtail the Prime Minister's ability to unilaterally interpret the Code or block investigations into allies. — transparency.org.uk (media) — “the Prime Minister's ability to unilaterally interpret or disregard the Code, or block investigations into allies, would be significantly curtailed”

Biggest unknown: Whether Parliament gains appointment powers and statutory sanctions change enforcement in practice, or whether the Prime Minister retaining discretion over consequences leaves the system largely unchanged.

Our reading: O9 covers due process and the rule of law — and the Ministerial Code is the primary instrument governing how those in executive power are held accountable. Currently the Code is not statutory, the Prime Minister appoints the Adviser and retains discretion over sanctions, and — as the evidence of 40 uninvestigated potential breaches shows — this has produced demonstrable accountability gaps. The policy addresses two of the three structural weaknesses: it would enshrine the Code in law (removing the Prime Minister's ability to simply rewrite or ignore it), and it would transfer the appointment power to Parliament (removing a clear conflict of interest). Independent institutional sources — the Institute for Government, the Committee on Standards in Public Life, the UCL Constitution Unit, and Transparency International UK — all recommend essentially these reforms, giving the direction of improvement credible external backing. The magnitude is moderate rather than major because a real residual weakness remains: the evidence indicates that the ultimate decision on sanctions would likely remain with the Prime Minister, and recent executive reforms have already partially addressed the investigation-initiation problem. This policy's marginal gain is therefore real but bounded — it would strengthen the formal architecture of due process without fully resolving the enforcement gap. The time horizon is this-parliament, since statutory change requires primary legislation but is achievable within a single parliament. Confidence is moderate because the institutional consensus on direction is strong, but the practical effect depends on how the legislation is drafted — especially whether Parliament's appointment role is meaningful and whether sanctions are touched.