The three keys to accelerating infrastructure delivery

As the UK government sets out its 10-year infrastructure strategy, committing at least £725 billion of investment over the next decade, the challenge is no longer defining what needs to be delivered, but how to deliver it at pace and scale.

At UKREiiF, Mace Consult convened a roundtable of industry leaders to examine this issue directly. Across sectors, there was clear alignment on the barriers to progress and, importantly, on the changes needed to unlock delivery.

Funding constraints, policy complexity and decarbonisation targets are well understood. Yet delivery continues to trail ambition. The issue is not a lack of intent or innovation, but the systems, behaviours and capabilities that underpin delivery itself.

Three interconnected factors are increasingly shaping success: people, integration and decision-making.

Building the capability to deliver

The industry’s ability to deliver at scale is increasingly shaped by its people. Here, the challenge is not simply one of capacity, but of capability.

This is reflected in the government’s Major Projects Portfolio (GMPP), which represents over £718 billion of investment and an estimated requirement for more than 706,000 roles over the next five years, reinforcing the importance of pipeline certainty in enabling workforce and capability planning.

There is a shortage of construction delivery expertise and programme leadership, those with hands-on experience of delivering complex programmes in real-world conditions. As projects become larger and more interconnected, this practical understanding is essential to translating strategy into successful delivery.

At the same time, the pipeline of future talent remains fragile. Awareness of infrastructure careers is limited, and graduate readiness is inconsistent. While the sector offers long-term opportunity, it is not always visible or accessible to new entrants. Without a stronger focus on attracting, developing and retaining people, and a more aligned approach between clients and consultants to creating opportunities for emerging talent, the industry risks constraining its own ability to respond to growing demand. For example, while many organisations are committed to recruiting graduates, tender requirements often prioritise extensive experience, limiting the ability to invest in and deploy early-career professionals at scale.

Strengthening capability therefore requires more than recruitment. It calls for sustained investment in skills, clearer pathways into the profession, and the development of leaders who can navigate complexity across the full lifecycle of a programme. However, even with the right people in place, capability alone is not enough. How those individuals are brought together, and how they are enabled to work, is equally critical.

From collaboration to true integration

The language of collaboration is now well established across the industry. Integrated delivery models and early contractor involvement are widely seen as best practice. Yet in practice, delivery often remains fragmented.

Traditional structures still separate design, procurement and construction, leading to fragmented accountability and a disconnect between intent and delivery. Even where integration is sought, it is not always supported by aligned commercial models, appropriate and fair risk allocation, or governance arrangements.

These structural challenges have real consequences. They weaken continuity, reduce visibility of programme outcomes and introduce inefficiencies that accumulate over time.
By contrast, programmes that bring together delivery, commercial and advisory expertise from the outset, and maintain that alignment through to completion, are better able to manage complexity and sustain momentum. Integration, in this sense, is not simply about collaboration, but about creating a single, outcome-focused delivery system.

This reflects a wider principle in major programme delivery: “going slow to go fast”, where upfront investment in alignment, scope and governance reduces downstream inefficiencies. Yet even the most integrated teams can only move as fast as the decisions that guide them. This is where a third constraint becomes evident.

Unlocking faster, better decision-making

Decision-making remains one of the most significant barriers to delivery. Complex governance structures, multiple layers of approval and unclear accountability can slow progress, even where technical solutions are clear. In many cases, governance has evolved to reduce risk, but in doing so has created processes that limit pace and dilute ownership. The result is a system in which decisions are delayed, visibility is reduced and programmes struggle to maintain momentum.

More effective delivery models take a different approach. They create governance frameworks that support timely, informed decisions, with clear ownership, appropriate delegated authority, transparency across cost, schedule and risk, and the ability to identify and respond to issues early, recognising that delayed decisions can be more damaging than sub-optimal ones in complex programmes.

This is particularly important in the context of competing demands across the infrastructure pipeline. With multiple major programmes progressing simultaneously, competition for skills and supply chain capacity intensifies. Without clearer prioritisation at a system level, delivery confidence is reduced and value harder to realise.

Delivering in a complex system

Outcomes increasingly depend on a network of interdependencies, from energy provision and planning approvals to supply chain readiness and policy alignment. Delays are often driven not by construction itself, but by constraints elsewhere in the system. The Planning and Infrastructure Act is a positive step in accelerating consenting, though wider system constraints remain.

This reinforces the need for a more joined-up approach to delivery. One that aligns ambition with capability and recognises the interrelated nature of infrastructure programmes. Those that take this broader view are better able to anticipate constraints, manage interfaces and maintain overall programme certainty.

Turning insight into delivery

The implications are clear. Accelerating infrastructure delivery will require coordinated action across all three areas. There is also a role for government in de-risking projects through early-stage funding, helping to align market incentives and unlock delivery.

Investment in people and skills must remain a priority, ensuring the industry has the capability to deliver complex programmes at scale. Integration must move beyond intent, with delivery models designed to support continuity, alignment and shared accountability. And decision-making must become faster and more transparent, supported by governance that enables progress rather than constrains it.

The UK has a significant opportunity to transform its infrastructure over the coming decade. Realising that ambition will depend not just on what is planned, but on how effectively it is delivered.

Those able to align people, integration and decision-making, and take a more joined-up, outcome-focused approach, will be best placed to deliver infrastructure with certainty, at the scale and pace now required.