One Seat, Several Tables: Rethinking Director Overlap in UK Group Governance

In many UK groups, the same names appear at the top of every board pack. The parent finance director also chairs the subsidiary audit committee; the group managing director sits on three trading boards; the general counsel attends every entity meeting. On paper, this looks efficient. In practice, it can blur the line between group oversight and entity-level decision-making, leaving subsidiary boards with thin challenge and unresolved conflicts.

Director overlap is not inherently poor governance. Groups need continuity, common standards and a route for group strategy to reach each company. The difficulty arises when overlap is treated as an administrative convenience rather than a deliberate board design. As UK groups plan their 2026 governance calendars, the useful question is not simply how many directors sit on how many boards, but whether each mandate carries the time, information and independence needed to discharge it properly.

Start with a mandate map, not a headcount

A headcount of directorships tells a board very little. A mandate map is more useful. It should list every director, every UK entity on which they serve, the capacity in which they serve, committee memberships, chair roles, attendance, time commitment and the decisions reserved to that entity.

The map should distinguish legal directors from attendees, observers and advisers. It should also identify anyone who may be acting as a shadow director in practice, even if not formally appointed. Companies House filings provide a starting point, but internal reality often differs: a director may have resigned from a dormant subsidiary but still influence its decisions, or a group executive may attend regularly without being appointed.

The output should be a heat map by entity and by decision type. Which boards have no director with relevant local knowledge? Which entities rely on the same two people for quorum and challenge? Which decisions are routinely approved at parent level before the subsidiary board meets? These are governance signals, not merely scheduling issues.

Genuine oversight or routine endorsement?

Group oversight brings strategy, capital allocation, risk aggregation and talent management. Entity-level oversight requires directors to act in the interests of the company on whose board they sit, with regard to its own circumstances, creditors and stakeholders. The two perspectives can align, but they are not identical.

A subsidiary board is drifting towards rubber-stamping when its papers are indistinguishable from the parent pack, when discussion focuses only on group performance, and when local risks such as solvency, customer concentration, regulatory position or intragroup dependencies are not tested. Another warning sign is a pattern of decisions approved at parent level and later ratified by the subsidiary without substantive debate.

Genuine challenge does not require contrived dissent. It requires evidence that the second question was asked. Did the board probe the subsidiary's cash position after an intragroup recharge? Did it consider the effect of a group refinancing on its own covenants? Were conflicts declared and minuted? Did the chair invite a local managing director to explain a customer loss? Board minutes should record the substance of challenge, not only the fact of approval.

Conflicts are structural as well as personal

Overlap creates conflicts that are often predictable and sometimes overlooked. A director who sits on both parent and subsidiary boards may face tension between group liquidity needs and the subsidiary's own obligations to creditors. Intragroup charges, cash sweeps, guarantees, dividends and restructuring proposals can all place directors in difficult positions.

UK company law provides a framework for declaring interests, but compliance is not the same as good governance. Each entity should maintain its own conflicts register, not merely a group-level summary. Declarations should be made at the relevant board, recorded in the minutes, and supported by a clear process for recusal where appropriate. Related-party transactions should be visible to the entity board, even where group approval is also required.

Nominee directors require particular care. A director appointed by a parent is not a delegate who simply votes as instructed. They must exercise independent judgement in the interests of the company. That does not prevent them from considering group strategy, but it does require them to recognise when group interests and entity interests diverge.

Delegation needs a written spine

Much of the risk in director overlap sits in the space between formal authority and informal practice. A delegated authority matrix helps to close that gap. It should set out parent reserved matters, subsidiary reserved matters, consultation requirements and notification thresholds.

The matrix should distinguish approval from consultation. A subsidiary board that must consult the parent before appointing an adviser is in a different position from one that requires parent approval. Similarly, a group policy adopted centrally should be formally adopted by each entity where it affects local decision-making. Clear documentation reduces the risk of instructions being given behind the scenes, which can create shadow director concerns and weaken entity-level accountability.

For 2026, the matrix should be refreshed after any acquisition, reorganisation or refinancing. Bolt-on acquisitions are a particular pressure point: new subsidiary boards may inherit group directors before local reporting lines, conflicts and reserved matters have been settled.

A practical 2026 board composition routine

A proportionate annual routine can make overlap visible and manageable without creating a bureaucracy. In the first quarter, refresh the mandate map, skills matrix and time budget for each director. In the second, review conflicts registers, related-party transactions and intragroup agreements. In the third, assess board effectiveness through minutes sampling and chair one-to-ones, focusing on the quality of entity-level challenge. In the fourth, review succession, appointments and reserved matters ahead of the new year.

Each subsidiary board meeting should include entity-specific information: local trading performance, cash and solvency, regulatory or customer risks, and the effect of group decisions on the entity. The chair should confirm declarations of interest and ensure minutes capture the questions asked. For material subsidiaries, a genuinely independent non-executive director or an external chair can add challenge, but proportionality matters. Smaller groups may prefer an advisory board or periodic independent review.

A one-page governance dashboard can help the parent board monitor the portfolio: directors holding more than three mandates, entities without independent challenge, conflicts declared and recusals, decisions taken under delegated authority, and overdue appointments. The aim is not more directors. It is clearer mandates, better information and visible judgement.

Director overlap will remain a sensible feature of many UK groups. The governance task for 2026 is to make it deliberate: to know who sits where, why, and on what basis they can challenge. A board seat is not a courtesy. At every table, it carries duties that deserve more than a familiar name.