Short answer
For procurements commenced from 24 February 2025, the and form the main regime in England, Wales and Northern Ireland. They require objective award rules, equal treatment unless difference is justified, conflict management, extensive notices and lawful use of direct awards or modifications. Mandatory and discretionary exclusion grounds operate alongside a central debarment list.
Most devolved Scottish procurement remains under the , and related Scottish rules. Procurements begun before 24 February 2025 generally continue under the former Public Contracts, Utilities or Concession Contracts Regulations. The contract's territory, authority, commencement date, sector and value must therefore be established first.
Under the new Act, an aggrieved supplier normally has 30 days from actual or constructive knowledge to sue. A properly notified claim during an applicable standstill automatically suspends entry into or modification of the contract. Pre-contract remedies include setting aside decisions, corrective orders and damages. Post-contract remedies include damages and, where statutory conditions apply, prospective set-aside of the contract or modification. The legacy regulations instead use the term “ineffectiveness”.
Objectives and transparent decision-making
Section 12 requires authorities to have regard to value for money, maximum public benefit, sharing information so suppliers understand decisions, and:
“acting, and being seen to act, with integrity”
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Suppliers must be treated the same unless a difference justifies different treatment, with reasonable steps to prevent unfair advantage or disadvantage. Authorities must also consider barriers faced by small and medium-sized enterprises. These objectives guide choices but do not replace each operative duty on procedures, award criteria, notices and records.
Award criteria must relate to the subject matter, be clear, measurable and non-discriminatory, and identify weighting or order of importance. Conditions of participation must be proportionate ways to test legal/financial capacity or technical ability, not disguised award criteria. The authority assesses the most advantageous tender under the published methodology and should maintain a defensible audit trail for consensus scoring, clarifications and moderation.
The transparency sequence can include pipeline and planned-procurement notices, tender notices, transparency notices for direct awards, contract-award notices, assessment summaries, contract-details notices, publication of high-value contracts, performance and payment notices, contract-change notices and termination notices. The required notice depends on the authority, contract and route. Publication does not cure an unlawful substantive decision, but omission or inaccuracy can affect remedies and limitation.
Mandatory and discretionary exclusion
Schedules 6 and 7 contain mandatory and discretionary grounds. They cover specified convictions and misconduct, tax, competition infringements, professional misconduct, poor performance, insolvency and national-security risks, subject to detailed conditions. A mandatory ground generally makes the supplier “excluded”; a discretionary ground makes it “excludable”. Authorities must disregard or exclude in circumstances prescribed by sections 26 and 57, while discretionary grounds require a reasoned decision.
The inquiry can extend to associated persons relied on to satisfy participation conditions and intended subcontractors. Suppliers must be given a reasonable opportunity to replace certain problematic associated persons or subcontractors where the Act provides. Authorities assess whether circumstances are continuing or likely to recur, taking account of self-cleaning evidence such as compensation, cooperation, governance change and effective prevention measures.
Exclusion must be connected to the statutory ground, evidence and relevant time period. Treating an allegation or an entry in a foreign database as automatic guilt risks unfairness. Give the supplier notice and an opportunity to address disputed facts where required by fairness and the statutory process.
The debarment list is a separate central mechanism
A Minister may investigate whether a supplier is excluded or excludable and enter its name on the published debarment list. The entry identifies the ground, whether it is mandatory or discretionary and its expected end date. Contracting authorities then rely on the list as the Act specifies; listing is not merely advisory publicity.
Before listing, the Minister must give reasons and observe an eight-working-day debarment standstill. A supplier can seek interim suspension during that period. It may appeal within 30 days, but only on a material mistake of law, and can later seek removal where circumstances materially change or significant new information exists. Debarment and exclusion in a particular procurement are related but distinct decisions with different defendants and remedies.
Conflicts must be identified, assessed and mitigated
Sections 81–83 cover direct or indirect personal, professional and financial interests of anyone influencing the procurement, including ministers where applicable. The authority must take all reasonable steps to identify and keep conflicts under review, prepare a written conflicts assessment before the tender or transparency notice, and revise it through the process.
Mitigation may involve disclosure, recusal, information barriers, replacing evaluators, neutralising prior involvement or sharing material information. If a conflict gives a supplier an unfair advantage that cannot be avoided, or the supplier refuses necessary steps, the authority must treat it as excluded and remove it. Exclusion is a last consequence of an unmanageable advantage, not a substitute for attempting proportionate mitigation.
Direct award is exceptional but broader than emergency alone
Section 41 and Schedule 5 allow direct award where a specified justification applies: examples include unique supply for technical or intellectual-property reasons, additional or repeat supplies, extreme and unavoidable urgency, certain advantageous insolvency purchases and user-choice services. Section 42 permits regulations authorising direct awards needed to protect life, health, public order or safety. Section 43 permits a switch from a failed competitive procedure in defined circumstances.
The authority must document why every condition is met and normally publish a transparency notice before award. Poor planning does not create extreme urgency, and urgency justifies only what is strictly necessary. Where no mandatory standstill applies, a voluntary eight-working-day standstill can reduce the risk that a hidden breach later supports set-aside.
Tender and contract modifications have different tests
Section 31 governs changes during a competitive procedure. After the tender deadline, substantial changes generally require restart unless the original notice expressly permitted modification and the statutory conditions are met. A change is substantial where it could admit different suppliers, materially alter scope or change the likely award outcome. Extend deadlines where suppliers need time to respond.
After award, section 74 and Schedule 8 permit defined modifications, including clearly provided options, certain below-threshold changes, known risks, unforeseeable circumstances, permitted additional supply, supplier succession and non-substantial changes. A modification is substantial if it materially changes scope or economic balance, extends duration beyond permitted limits or could have affected competition. Calling it a variation cannot avoid a new procurement.
A contract-change notice is usually required before a permitted modification and may provide a voluntary standstill. Some high-value changes also require publication of the modified contract. Keep a cumulative view: a sequence of small changes may reveal a material redesign.
Standstill and automatic suspension
Before most covered awards, the authority supplies assessment summaries, publishes the contract-award notice and waits eight working days. Section 51 defines the mandatory period as:
“eight working days beginning with the day on which a contract award notice is published”
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If proceedings begin during an applicable standstill and the authority is notified, section 101 prevents contract entry or modification. The court may lift, alter or extend suspension after weighing lawful procurement and service continuity, supplier interests, adequacy of damages and other relevant matters. Suppliers should send a focused pre-action letter quickly, but correspondence does not stop limitation.
Set-aside, legacy ineffectiveness and damages
Before contract, the court can set aside an unlawful decision, require corrective action, award damages or make another appropriate order. After contract, it may award damages and must set aside prospectively when a section 105 condition is met—such as absence of a required award notice, breach of standstill or automatic suspension, or a breach discoverable only after award—unless overriding public interest requires preserving the contract. It may then shorten the term or supplies instead.
The ordinary limit is 30 days from when the supplier knew or ought to have known the relevant circumstances. The court may extend to three months for good reason. Specified set-aside claims also have a six-month longstop. Issue and notification timing are critical.
Damages require actionable breach, causation and recoverable loss. Under the legacy EU-derived regime, requires a sufficiently serious breach. confirms that a material scoring error can alter the award yet still fail that damages threshold. The new Act expressly authorises damages, but suppliers should plead the applicable regime rather than assume every breach produces compensation.
Practical steps
Authorities should record regime selection, conflicts, exclusion checks, direct-award reasons, scoring and modification grounds before acting. Suppliers should preserve notices and portal messages, request reasons immediately, calculate limitation conservatively, and identify the precise decision, lost opportunity and remedy sought. Both sides should separate urgency about public services from avoidable procurement delay.
Conclusion
UK procurement law now turns on a new central Act alongside Scottish and transitional regimes. Exclusion and debarment require evidence and process; conflicts require active mitigation; direct awards and modifications need exact statutory grounds; and transparency creates the window for effective challenge. Waiting until signature can convert a correctable competition into a narrow claim for set-aside or damages.
Sources
This article provides general legal information, not advice for a specific matter. Laws, facts and procedural deadlines may change the result. Follow the linked primary sources and obtain local advice before acting.