The UK government has changed the way early procurement notices are published, and that has made the process much easier to understand.

Since the Procurement Act 2023 went live on 24 February 2025, contracting authorities have moved away from older notice names inherited from the previous regime and onto a clearer UK notice framework. In practice, this means buyers and suppliers now see a more structured journey on the Find a Tender service from forward planning through to live tender.

A lot of people refer to this as the new "pipeline notice system", but it is worth being precise: only UK1 is formally the Pipeline Notice. UK2, UK3, and UK4 are the notice stages that sit alongside it and help explain where a procurement sits in its lifecycle.

If you used to watch for PINs and Contract Notices, this change matters because the new names tell you much more clearly what is happening, what stage the buyer is at, and whether you need to act now or simply prepare.

What changed?

Under the old procurement regime, early-stage procurement information could be difficult to interpret. A Prior Information Notice (PIN) might be used to signal future work, warm up the market, or sometimes simply satisfy a procedural requirement. A Contract Notice then marked the formal launch of a competition.

The new system separates those purposes into clearer, more specific notice types. Instead of one notice doing several different jobs, each notice now has a more defined role.

That is the biggest improvement: one stage, one signal.

UK1 to UK4 explained

UK1: Pipeline Notice

A UK1 Pipeline Notice gives the market a forward look at future opportunities.

In broad terms, it is aimed at larger contracting authorities and is intended to improve visibility of planned procurement activity. Where it applies, it helps suppliers understand what may be coming over the next period rather than discovering opportunities only when the tender goes live.

This is useful for strategic planning, partnership discussions, and bid resource management. For suppliers, UK1 is less about immediate action and more about market awareness.

UK2: Preliminary Market Engagement Notice

A UK2 Preliminary Market Engagement Notice tells the market that the authority is engaging before launching the procurement.

This creates a clearer signal that the buyer is testing assumptions, gathering feedback, or speaking to potential suppliers before finalising the tender. Under the older regime, this activity was possible, but the notice trail around it was often less obvious.

For suppliers, UK2 is the stage where you may be able to help shape the authority's understanding of the market, delivery model, or commercial approach.

UK3: Planned Procurement Notice

A UK3 Planned Procurement Notice is a stronger signal that a procurement is expected and that the authority intends to move toward a formal competition.

It sits between general forward visibility and the live tender stage. In other words, it tells the market that the opportunity is no longer just part of a long-range pipeline; it is a more defined upcoming procurement.

For suppliers, UK3 is the point to start preparing seriously, reviewing likely requirements, lining up delivery partners, and watching closely for the formal tender.

UK4: Tender Notice

A UK4 Tender Notice is the formal signal that the procurement is live.

This is the notice that replaces the role most suppliers previously associated with the Contract Notice. Once UK4 is published, the authority is no longer simply signalling intent or engaging the market; it is inviting participation in the procurement process.

For suppliers, UK4 is the point where active bid work begins.

What the new system replaces

The easiest way to understand the reform is to see it as a move away from broad legacy notice types and toward more specific UK-defined stages.

Broadly speaking, the new structure replaces or reshapes the older approach in the following ways:

• Prior Information Notice (PIN) has effectively been split into more specific functions across UK1, UK2, and UK3.
• Contract Notice has, in practical terms, been replaced by UK4 Tender Notice as the formal launch notice for a procurement.
• Older terminology rooted in the previous EU-derived procurement regime has been replaced by a UK-specific notice structure designed around the Procurement Act 2023.

Why this is clearer

The move from legacy notices to UK1 through UK4 improves clarity in several ways:

• It separates planning from engagement. A long-range pipeline signal is now distinct from active pre-tender market engagement.
• It separates preparation from launch. Suppliers can tell the difference between an opportunity that is coming soon and one that is already live.
• It reduces ambiguity. A single notice no longer has to cover multiple different intentions.
• It improves supplier planning. Businesses can decide whether to monitor, engage, prepare, or bid.

What this means for suppliers

For suppliers, the practical takeaway is simple:

• UK1 means "watch this space."
• UK2 means "the buyer is listening."
• UK3 means "start getting ready."
• UK4 means "the opportunity is live."

Summary

The shift to UK1 to UK4 is more than a change in naming. It is a move toward a clearer procurement journey.

Under the old system, suppliers often had to interpret broad notice types and infer what stage a procurement had really reached. Under the new framework, the notice itself does more of that work. That makes the market easier to navigate, improves transparency, and gives both buyers and suppliers a better understanding of what happens next.