The Chatham House Rule originated at Chatham House (the Royal Institute of International Affairs) in London in 1927, and it has since become one of the most widely used, and widely misunderstood, conventions in governance and public discourse.
For UK boards, the Rule shows up in a specific and fairly narrow context: certain committee discussions, sector roundtables, regulatory briefings, and peer forums where NEDs and trustees compare notes across organisations.
It is not a substitute for a confidentiality policy, and it is not how ordinary board meetings should be minuted. Understanding the difference matters, because boards that misapply the Rule can end up with governance records that are too thin to be defensible.
The current wording, as maintained by Chatham House itself, is precise. It states:
“When a meeting or part thereof, is held under the Chatham House Rule, participants are free to use the information received, but neither the identity nor the affiliation of the speaker(s), nor that of any other participant, may be revealed.”
The point is not secrecy. The point is to let people speak candidly about difficult or sensitive subjects without the discussion being attributed back to them personally or professionally.
This is a narrower protection than most people assume. It does not mean the meeting is confidential in the sense that nothing can be discussed afterwards. It means the content can travel but the attribution cannot. A trustee who hears a candid assessment of a regulatory risk at a sector forum can absolutely act on that information and bring it back to their own board. What they cannot do is say "the CEO of [organisation] told me that..."
Chatham House also publishes a related code of conduct for events, which is worth reading alongside the Rule itself. It sets expectations around behaviour, not just attribution, and the two documents together give a fuller picture of what governed candour is meant to look like in practice.
Boards, by design, need two things that can sit in tension: honest, unguarded discussion, and a clear, accountable record of what was decided and why. The Chatham House Rule was built to protect the first without abandoning the second.
In a sector briefing, a regulator roundtable, or a cross-board NED forum, participants are often more willing to name a real problem, a governance failure, or a genuine concern about executive performance if they know it will not be traced back to them by name. Remove that protection and the conversation tends to flatten into generalities that are safe to say but not particularly useful.
This is precisely why the Rule has spread well beyond its original diplomatic context into charity sector conferences, NED networking events, professional development forums, and increasingly, specific segments of board and committee discussions where a director wants unfiltered input from peers or advisors before forming a view.
The Rule has a legitimate place in board life, but it shouldn’t be taken as a broad governance principle. Rather it applies to specific situations.
Appropriate uses of the Chatham House Rule include:
Inappropriate uses include:
A board's statutory obligations do not pause for a discussion that is held under the Rule. Directors remain accountable for their decisions even when the Chatham House Rule is invoked. What changes is how that specific portion of the conversation is attributed afterwards — generally to the entire board rather than “X said Y”, the record would be “Y topic was discussed, with these risks flagged”.
The important takeaway here is that the board's overall governance record still needs to be complete and detailed, the Rule does not mean sections of the conversation get left out of the minutes.
When misunderstood the Chatham House Rule is sometimes treated by boards as a kind of informal confidentiality. However, the two are distinct and not interchangeable.
Confidentiality means the content of a discussion is not shared outside the room at all. Board papers marked confidential, discussions about individual staff performance, commercially sensitive negotiations, and safeguarding matters typically fall under standard confidentiality obligations, not the Chatham House Rule. Nothing leaves the room, full stop.
The Chatham House Rule allows the content to leave the room; it is the attributed source that doesn’t get shared. A trustee attending a sector conference under the Rule can go back to their own board and say "there's a growing view across the sector that X policy needs to be reassessed given current funding volatility," without naming who said it or at which organisation.
Boards that conflate the two often end up in one of two positions, and neither serves good governance:
For boards and chairs who want to use the Rule deliberately and correctly rather than casually, there are a few practices that make a real difference.
1. Declare it explicitly, and scope it narrowly.
If the chair of the meeting wants to invoke the Rule for a specific agenda item, that should be stated clearly at the start of that item, not assumed. "This next item is held under the Chatham House Rule" tells everyone in the room exactly what latitude they have and where it ends.
2. Keep the minute, adjust the attribution.
A discussion held under the Rule still needs to be recorded; what changes is the level of detail attached to individual contributors. The minutes might capture that "the board discussed concerns about reserve levels raised in the context of recent sector guidance" without attributing the specific framing to a named director, while any resulting decisions and actions captured in full.
3. Don't let it swallow decision-making.
Whatever is said under the Rule during discussion, the decision itself, who proposed it, who seconded it, how the vote went, and the reasoning behind it, should be recorded normally. The Rule protects candour in discussion; it does not exempt a board from the basic discipline of a defensible decision trail.
4. Brief NEDs and trustees before they attend external forums.
Multi-board NEDs and trustees are exactly the people most likely to encounter the Rule in the wild, at sector conferences, regulator briefings, and cross-board networking events. Making sure they understand the distinction between "shareable but unattributed" and "fully confidential" protects both organisations they serve.
The Chatham House Rule, used properly, is a governance tool. It creates space for honesty in situations where full attribution would shut candour down, while leaving the board's actual accountability trail untouched.
Good governance depends on boards being able to distinguish between the parts of a discussion that genuinely benefit from protected candour, and the parts that require a clear, attributable record because they carry legal, financial, or reputational weight.
For a broader grounding in how transparency, accountability and confidentiality fit together at board level, see our guide to the principles of good governance.
Boards that handle this well tend to have the underlying admin sorted with well structured agendas, detailed board packs, and systems in place to accurately capture conflicts, minutes, decisions, and actions. The structure makes it simple for a chair to note where part of a discussion was held under a specific convention like the Chatham House Rule, without that affecting the quality of the rest of the record.
BoardPro makes assembling and sharing agendas and board packs, capturing decisions and actions, and formatting and sharing minutes easy. Directors, NEDs, and trustees get a single source of truth, interrogatable by our built in (closed-system) AI, so they always arrive at meetings with all the right right questions ready.
When it comes to keeping your governance record you can use our AI minutes feature to simply upload your transcript and it will structure your minutes against the agenda, capturing decisions and actions automatically. Simply review, edit and share. What used to take hours, now takes minutes.
Remember, none of this replaces a board's own judgement about when candour needs protecting and when a decision needs full attribution. But it removes the administrative friction that often causes boards to cut corners on records in the first place, whether that's a rushed CEO report or minutes drafted from memory a week after the meeting.
Board management software built for the way small and mid-sized UK boards actually work, from agenda to action.