What are standstill periods in public sector procurement?

A standstill period is a mandatory pause between the notification of a procurement award decision and the signing of the contract, during which unsuccessful bidders can challenge the outcome. In UK public sector procurement, this period gives suppliers who were not selected a formal window to seek clarification, raise concerns, or pursue a legal remedy before the contracting authority becomes bound by a new agreement. The sections below address the most common questions organisations and suppliers have about how the standstill period works in practice.

Why do public sector buyers have to observe a standstill period?

Public sector buyers must observe a standstill period because it protects the integrity of the procurement process and gives unsuccessful bidders a fair opportunity to challenge an award decision before it becomes legally binding. Without this pause, a contracting authority could sign a contract immediately after announcing its decision, leaving aggrieved suppliers with no practical remedy even if a procedural error had occurred.

The standstill requirement originates from European procurement directives and was embedded into UK law through the Public Contracts Regulations 2015 and equivalent regulations covering utilities and defence. Following Brexit, these obligations were carried forward into domestic law and remain in force under the Procurement Act 2023, which came into effect in 2024 and now governs most public procurement in England, Wales, and Northern Ireland.

The underlying rationale is transparency and accountability. Public money is being spent, and the process by which it is committed must be open to scrutiny. If a supplier believes the evaluation was flawed, the criteria were applied inconsistently, or the contracting authority failed to follow its own published process, the standstill period is the mechanism that allows that concern to be raised before the situation becomes irreversible. It also encourages contracting authorities to conduct rigorous, well-documented evaluations, knowing that their decisions may be scrutinised.

How long does a standstill period last in UK procurement?

In UK public sector procurement, the standard standstill period lasts a minimum of ten days when award notifications are sent electronically. If notifications are sent by fax or post, the minimum period extends to fifteen days. These timescales apply under the Procurement Act 2023 and broadly mirror the obligations that existed under the Public Contracts Regulations 2015.

The ten-day minimum runs from the day after the standstill notice is sent to all tenderers, not from the date the winning supplier is informed. This distinction matters because the clock must give all parties, including those who submitted unsuccessful bids, a fair and equal window in which to act.

Contracting authorities are free to allow a longer standstill period if they choose, and in complex or high-value procurements it is sometimes prudent to do so. A longer window gives suppliers more time to review the feedback they receive and to take legal advice if they believe the process was flawed. However, extending the period unnecessarily can delay service delivery, so most organisations aim to observe the minimum unless there is a specific reason to allow more time.

The standstill period is sometimes referred to informally as the Alcatel period, a term that originates from a landmark European Court of Justice ruling in 1999 that first established the principle of a mandatory pause before contract signature in European procurement law.

What information must be included in a standstill notice?

A standstill notice must include enough information to allow unsuccessful bidders to understand why they were not selected and to assess whether they have grounds to challenge the decision. Under the Procurement Act 2023, contracting authorities are required to issue an Assessment Summary to each tenderer at the point of the award decision, which effectively serves as the formal standstill notification.

The information that must be communicated typically includes the following:

• The name of the winning supplier
• The scores awarded to the notified tenderer across each evaluation criterion
• The scores awarded to the winning tenderer across each evaluation criterion
• The reasons for the relative scoring, including where the notified tenderer fell short
• The date on which the standstill period will end

The level of detail required is significant. Vague or generic feedback does not satisfy the transparency obligation. A supplier receiving a standstill notice should be able to identify specifically where their bid underperformed and compare that performance against the winning submission. This is what enables an informed decision about whether to seek further clarification or pursue a formal challenge.

Contracting authorities that provide superficial feedback risk not only complaints from suppliers but also legal exposure if a court later finds that the notice did not give a bidder sufficient information to protect their rights during the standstill window.

What can unsuccessful bidders do during a standstill period?

During the standstill period, unsuccessful bidders can seek further clarification from the contracting authority, take legal advice, and, if appropriate, apply to the courts for an automatic suspension that would prevent the contract from being signed. The standstill window is specifically designed to make these actions possible before the award becomes final.

Requesting clarification

An unsuccessful bidder who receives a standstill notice and finds the feedback unclear or insufficient can contact the contracting authority to request additional information. Contracting authorities are expected to respond promptly and substantively. If the clarification reveals an error in the evaluation, the authority may need to revisit its decision, which can result in the standstill period being reset.

Applying for an automatic suspension

If a supplier believes the procurement process was unlawful and intends to bring a legal challenge, they can issue proceedings in the High Court during the standstill period. Under the procurement regulations, issuing proceedings before the contract is signed triggers an automatic suspension, which prevents the contracting authority from entering into the contract until the court either lifts the suspension or the case is resolved.

Courts can lift an automatic suspension if the balance of convenience favours allowing the contract to proceed, particularly where delay would cause significant public harm. However, the automatic suspension remains a powerful tool for suppliers who have genuine grounds for challenge, because it preserves the practical remedy of having the procurement rerun or the decision overturned before any contract is in place.

Suppliers considering this route should act quickly. Legal advice should be sought as early as possible once a standstill notice is received, because the window is short and the procedural requirements for issuing proceedings are strict.

What happens if a contracting authority breaches the standstill period?

If a contracting authority breaches the standstill period by signing a contract before the required pause has elapsed, the contract can be set aside by a court and declared ineffective. This is one of the most serious consequences available under UK procurement law, and it reflects how significant the standstill obligation is considered to be.

An ineffectiveness order means the contract is treated as void from the outset. In practice, this is a significant disruption for both the contracting authority and the winning supplier, who may have already begun mobilising resources or making commitments in anticipation of the contract starting. Courts also have the power to impose civil financial penalties on contracting authorities that breach the rules.

Beyond the legal consequences, a breach of the standstill period can damage an organisation’s reputation with the supplier market and undermine confidence in its procurement function. Suppliers who feel their rights have been ignored are less likely to invest in future bids, which reduces competition and ultimately harms value for money.

Contracting authorities should treat the standstill period as a non-negotiable step in the award process, not an administrative formality. Clear internal processes, including checklists that confirm the standstill has been properly observed before contract signature, are an important safeguard.

Are there any exemptions from the standstill period requirement?

Yes, there are limited circumstances in which a contracting authority is not required to observe a standstill period before signing a contract. These exemptions are narrowly defined and should not be treated as a general escape route from the obligation.

The main situations in which the standstill requirement does not apply include:

• Contracts below the relevant threshold: Procurement regulations, including the standstill obligation, apply above certain financial thresholds. Contracts below those thresholds are not subject to the same requirements, though contracting authorities may choose to apply similar principles voluntarily.
• Framework agreement call-offs: Where a contract is awarded through a mini-competition or direct award under an existing framework agreement, the standstill period may not apply, depending on how the framework was structured and the specific circumstances of the call-off.
• Single-tender actions: In genuine cases of extreme urgency, where only one supplier can meet the requirement and delay would be harmful, a contracting authority may proceed without competition and therefore without a standstill period. However, the conditions for justifying a single-tender action are strict and must be documented carefully.
• Contracts awarded to the only tenderer: Where only one bid was received and there are no other parties to notify, the rationale for a standstill period is significantly reduced, though authorities should still follow their internal governance processes.

Even where an exemption technically applies, contracting authorities should consider whether it is good practice to allow a brief pause before signing. The standstill period exists to protect process integrity, and that principle has value beyond its strict legal application.

How eXceeding helps with public sector procurement compliance

Navigating the rules around standstill periods, award notifications, and procurement compliance is demanding, particularly for organisations without a large in-house procurement function. eXceeding supports public sector organisations at every stage of the procurement process, including the critical post-award phase. Here is how the team can help:

• Designing and running compliant tender processes that reduce the risk of challenge during the standstill period
• Drafting clear, legally robust standstill notices and Assessment Summaries that meet the transparency requirements of the Procurement Act 2023
• Advising contracting authorities on how to respond to supplier queries and clarification requests during the standstill window
• Providing interim procurement resource to organisations that need experienced professionals to manage complex award processes
• Supporting organisations through the full procurement lifecycle, from strategy and market engagement through to contract signature and supplier relationship management

Whether you are running a high-value tender for the first time or looking to strengthen your existing procurement governance, eXceeding’s independent experts act in your organisation’s best interest at every step. Get in touch with the eXceeding team today to discuss how we can support your next procurement.

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