The Lawful Business Case: Evidencing Power Before Commercial Commitment

Public bodies are increasingly asked to behave commercially. A council may consider acquiring an interest in land, establishing a delivery company, entering a joint venture or supporting a regeneration scheme through a grant or guarantee. Each proposal will arrive with a business case, a financial model and a delivery timetable. None of those documents answers the threshold question: does the body have legal power to do this, for this purpose, through this structure?

That question is not a formality. It is the foundation on which every later approval rests. In 2026, with budgets under sustained pressure and commercial returns carrying greater expectations, the risk of challenge is not confined to procurement disputes. Auditors, members, community groups, unsuccessful partners and regulators may all ask whether a public body has acted within its powers. A persuasive case for value is no substitute for a lawful mandate.

Value is a second question

A commercial appraisal asks whether a project is worthwhile. A vires assessment asks whether the public body can undertake it at all. The two inquiries are related, but they are not interchangeable. If the power is absent, the quality of the financial model is irrelevant. If the power exists but is confined to a particular purpose, a project that drifts beyond that purpose may be unlawful even where it is profitable. If the power is exercisable only through a particular procedure, skipping that procedure can undermine the decision.

Officers and advisers should therefore resist the temptation to treat legal input as a later workstream. The legal question belongs at the point of project conception, before options are narrowed and before external expectations harden. It should be revisited when the delivery vehicle changes, when funding arrangements shift and when the commitment moves from exploration to contractual obligation.

Source, purpose and method

A defensible vires assessment usually addresses three connected questions.

First, what is the source of power? For local authorities, this may be an express statutory provision, the general power of competence or an incidental power. The general power is broad, but it is not unconditional, and it does not remove the need to consider other statutory regimes. For other public bodies, the governing statute and any secondary legislation will determine what is permitted. The analysis should identify the provision relied on and any limits, consents or conditions attached to it.

Second, what is the statutory purpose? A body may have power to do something, but only for a defined purpose. A commercial venture that is said to support regeneration, service delivery or financial resilience should be tested against the purpose actually authorised. The record should explain the connection rather than assume it. Where a project serves mixed purposes, the legal analysis should identify which purposes are within power and how the project is structured to remain within them.

Third, what method is proposed? A company, joint venture, land disposal, grant, guarantee or procurement may each attract different legal tests. The delivery vehicle cannot be used to bypass the underlying power. A council-owned company is not a lawful workaround for activity the council itself could not undertake. A joint venture does not dilute the need for each participant to have power to enter it. A land development scheme may depend on disposal, appropriation, planning and subsidy control considerations that sit alongside the vires question.

The vehicle can change the answer

Commercial structures are often chosen for reasons of governance, risk or funding. They also change the legal analysis. Establishing a company raises questions about the body's power to invest, the company's purposes, the appointment and duties of directors, the flow of information and the management of conflicts. A joint venture requires attention to the powers of all participants and to the decision-making arrangements between them. A development project may require separate consideration of land ownership, disposal terms, best consideration, planning and state support rules.

These are not reasons to avoid commercial delivery. They are reasons to document the route carefully. The legal file should show that the structure was chosen after the powers were understood, not before.

A pre-commitment vires file

A practical discipline is to maintain a vires file that sits alongside the business case and is updated at each decision point. It need not be lengthy, but it should be specific.

A useful checklist includes:

• the decision being sought and the precise point at which the body becomes committed;
• the statutory source of power and any conditions, consents or restrictions;
• the statutory purpose relied on and the evidence connecting the project to it;
• the proposed delivery vehicle and why it is lawful;
• the financial authority, budget provision and approval route;
• delegated authority and whether the decision-maker is properly authorised;
• external consents, procurement rules, subsidy control and any other applicable regime;
• conflicts of interest, director duties and governance arrangements;
• legal advice obtained, including assumptions and unresolved points;
• conditions, review points and monitoring arrangements;
• the record of challenge and how it was resolved.

The checklist should be used critically. A tick is not evidence. The file should contain the reasoning that supports each answer.

Keep the business case and legal case distinct

Business cases often include a legal section, but that section may do little more than confirm that lawyers have been consulted. That is not enough. The legal case should be capable of standing on its own: it should identify the power, explain its limits, apply it to the facts and record any residual uncertainty. Where the position is unclear, the appropriate response is to obtain further advice, adjust the proposal or decline to proceed until the point is resolved. Ambiguity should not be smoothed over in an executive summary.

This matters particularly where financial pressure is used to justify speed. Urgency may affect the timetable, but it does not expand statutory power. A decision taken quickly without a clear vires record is more exposed, not less.

The decision record is the evidence

The minutes and reports should show that the right questions were asked. A minute that records only that legal advice was noted is weak. A stronger record identifies the power relied on, the purpose served, the limits considered and the conditions attached to the approval. It should also show that delegated authority was checked and that any conflicts were managed.

That record serves more than one audience. It supports good governance, informs delivery teams and provides the evidential basis for responding to challenge. In a commercial project, the decision record may be the clearest evidence that the public body separated lawful authority from commercial aspiration.

Conclusion

Vires before value is a discipline, not an obstacle. Public bodies should want to know that a project is lawful before they commit resources, reputation and public money to it. In 2026, the most defensible commercial decisions will be those where the business case is matched by a clear legal case and a decision record that explains both. Value matters. But power comes first.