When is it lawful to sole-source a contract in the public sector?

It is lawful to sole-source a public sector contract when specific statutory exceptions apply, meaning a contracting authority can award directly to a single supplier without running a competitive tender. These exceptions are narrow and strictly defined under UK procurement regulations. Understanding exactly when they apply, and how to document them properly, is essential for any public sector organisation seeking to stay compliant.

What are the legal grounds for sole sourcing a public sector contract?

Under the Procurement Act 2023, which came into force in February 2025 and now governs most public sector procurement in England, Wales, and Northern Ireland, a contracting authority may award a contract directly to a single supplier in a limited set of circumstances. These are known as direct award justifications, and they replace what were previously called single tender actions under the Public Contracts Regulations 2015. The grounds include genuine urgency arising from unforeseen events, a supplier’s unique technical capability, the protection of exclusive rights, and certain other specific situations defined in the Act.

The key principle is that sole sourcing, or direct award, is the exception and not the rule. UK procurement law is built on the presumption of open competition. A contracting authority that awards a contract without competition must be able to demonstrate that one of the recognised legal grounds applies and that it did not create the circumstances that made competition impossible. Each ground has its own threshold and conditions, and none of them are a blanket permission to bypass the market.

What counts as genuine urgency in sole-source procurement?

Genuine urgency in sole-source procurement means that an unforeseen event has created a situation so time-critical that running a competitive tender is genuinely impracticable. The urgency must be caused by circumstances outside the contracting authority’s control, and the authority must not have contributed to the situation through its own delays or poor planning. This is one of the most commonly cited grounds for a direct award contract in the UK public sector, and also one of the most frequently challenged.

Regulatory guidance and case law have consistently confirmed that urgency cannot be self-created. If a contract expires because an organisation failed to begin a new procurement process in time, that is not a valid basis for sole sourcing. Urgency must be extreme, meaning that even an accelerated competitive procedure such as a limited tender or a negotiated procedure with prior publication would be insufficient to meet the genuine operational need.

Examples that may qualify include a sudden equipment failure in a critical healthcare setting, an emergency requiring immediate specialist services following an unforeseen incident, or a supplier’s abrupt exit from a contract with no notice period. Even in these cases, any direct award should be time-limited, covering only the period necessary to run a proper procurement process, and it should be documented thoroughly from the outset.

When can a supplier’s unique technical capability justify a direct award?

A supplier’s unique technical capability can justify a direct award when the goods, works, or services required can only be provided by a single supplier due to the protection of exclusive rights, including intellectual property, or because no reasonable alternative or substitute exists in the market. This ground applies in genuine monopoly situations, not simply where one supplier is preferred or considered superior.

The contracting authority must be able to demonstrate that it has assessed the market and confirmed that no other supplier could reasonably meet the requirement. Preference, familiarity, or even a belief that a particular supplier is the best available are not sufficient. The exclusivity must be objective and verifiable. Common examples include proprietary software where only the original developer holds the source code, specialist maintenance of bespoke systems, or the continuation of a service where switching providers would require a technical integration that is genuinely impossible within the required timeframe.

It is also worth noting that this ground is not a permanent entitlement. Contracting authorities should review whether the exclusive position still holds each time a contract is renewed, and where possible they should plan procurements that reduce dependency on single-source suppliers over time.

What documentation is required when sole sourcing a public contract?

When sole sourcing a public contract, the contracting authority must produce a written justification that records the legal ground being relied upon, the specific circumstances that make competition impracticable, and the steps taken to confirm that no competitive process is possible. Under the Procurement Act 2023, there are also new transparency requirements, including the publication of a transparency notice before or shortly after a direct award in most cases.

The documentation should include the following as a minimum:

• A clear statement of which statutory exception applies and why
• Evidence that the circumstances were not foreseeable or self-created by the authority
• A record of any market assessment carried out to confirm the absence of alternatives
• The value and duration of the contract being awarded directly
• A plan for returning to competitive procurement at the earliest opportunity
• Sign-off from a suitably senior officer within the organisation

Poor documentation is one of the most common reasons that direct awards are later found to be unlawful. Even where the underlying justification is sound, an inability to evidence the decision-making process can expose the authority to challenge. Keeping a clear and contemporaneous audit trail is not optional. It is a core part of demonstrating compliance.

What are the risks of unlawful sole sourcing in the public sector?

Unlawful sole sourcing in the public sector carries significant legal, financial, and reputational risks. A contract awarded without proper justification can be challenged by unsuccessful suppliers, declared ineffective by the courts, and result in financial penalties. Under the Procurement Act 2023, the remedies available to aggrieved suppliers have been strengthened, and the consequences of non-compliance are more visible than ever due to expanded transparency obligations.

The specific risks include:

• Contract ineffectiveness: Courts can declare a contract void, leaving the authority without a valid supplier arrangement and potentially exposed to service disruption
• Financial penalties: Authorities may be ordered to pay damages to suppliers who were unlawfully excluded from a competition
• Reputational damage: Findings of non-compliance are a matter of public record and can damage trust with stakeholders, auditors, and the communities an organisation serves
• Internal audit and oversight consequences: Internal audit functions and external regulators such as the National Audit Office may flag unlawful direct awards, triggering further scrutiny of procurement practices across the organisation
• Loss of funding or grant conditions: For organisations in receipt of central government funding, procurement non-compliance can jeopardise future funding eligibility

The risk is not theoretical. There have been a number of high-profile cases in the UK where public bodies faced legal challenge and significant cost as a result of unjustified sole sourcing, particularly in the period following the pandemic when urgency justifications were used broadly and sometimes without sufficient rigour.

How does sole sourcing differ from a framework call-off or dynamic purchasing system?

Sole sourcing differs from a framework call-off or dynamic purchasing system in a fundamental way: frameworks and dynamic purchasing systems (DPS) are pre-competed routes to market, meaning competition has already taken place, whereas sole sourcing bypasses competition entirely. Calling off a contract through an established framework or DPS is not sole sourcing and does not require the same exceptional justification.

A framework agreement is a pre-tendered arrangement with one or more suppliers, established through a compliant competitive process, from which contracting authorities can place orders under pre-agreed terms. A call-off from a framework is lawful without further full competition, provided the call-off is within the framework’s scope and the correct mini-competition or direct award rules within the framework are followed.

A dynamic purchasing system operates on a similar principle but remains open to new suppliers throughout its life, making it a more flexible route for categories where the market evolves regularly. Both frameworks and DPS arrangements are specifically designed to reduce procurement burden while maintaining compliance, and they are not equivalent to a sole-source direct award.

The distinction matters because organisations sometimes conflate the two. Using a framework correctly is a legitimate and compliant procurement route. Awarding outside a framework, or treating a preferred supplier relationship as though it were a framework, is not. If your organisation is uncertain whether a particular route constitutes lawful sole sourcing or a compliant framework call-off, that uncertainty itself is a signal to seek expert procurement advice before proceeding.

How eXceeding helps with sole sourcing and procurement compliance

eXceeding works with public sector organisations to navigate complex procurement regulations, including the circumstances where a direct award may be justified and how to document and manage that process compliantly. Whether you are facing a genuine emergency, assessing a supplier’s unique capability claim, or simply want to ensure your procurement decisions are defensible, eXceeding’s consultants provide the independent expertise you need.

• Assessment of whether a direct award justification is legally sound under the Procurement Act 2023
• Support with producing compliant documentation and transparency notices
• Guidance on returning to competitive procurement as quickly as possible after an emergency award
• Review of framework and DPS options as compliant alternatives to sole sourcing
• Independent procurement advice that is not tied to any supplier, system, or framework

If your organisation is considering a sole-source contract or wants to strengthen its procurement compliance more broadly, speak to our procurement specialists to find out how eXceeding can help you procure with confidence.

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