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NISTA Government Major Projects Portfolio — page 1

NISTA Government Major

Projects Portfolio

Strengthening National Delivery and Infrastructure Excellence

NISTA | GMPP

NISTA Government Major Projects Portfolio — page 2

Introduction to NISTA

The National Infrastructure and Service Transformation Authority (NISTA) represents the evolution of

UK project delivery excellence. Formed from the merger of the Infrastructure and Projects Authority

(IPA) and the National Infrastructure Commission's delivery arms, NISTA oversees the Government

Major Projects Portfolio (GMPP). Our mission is to ensure the UK’s most complex and high-risk

projects are delivered on time, within budget, and to the highest standards of public service.

"Project delivery is the engine room of government. Through NISTA, we are

providing the leadership and assurance needed to transform national infrastructure

and public services for the next generation."

Government Major Projects Portfolio

Page 2

The Government Major Projects

Portfolio (GMPP)

The GMPP comprises the most significant, complex, and high-value projects in the UK government.

These projects are defined by their level of risk, strategic importance, and financial investment. As of

2025/26, the portfolio includes projects across four primary categories: Infrastructure and

Construction, Transformation and Service Delivery, Military Capability, and ICT Modernization.

Strategic Alignment

This category is aligned with the National Infrastructure Strategy and the government's digital

transformation roadmap, ensuring that every pound spent drives national growth and resilience.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 3

Portfolio at a Glance

The scale of the GMPP reflects the UK government's ambition. These metrics provide a snapshot of

the portfolio's immense value and the concentration of investment in physical and digital

infrastructure.

TOTAL NUMBER OF PROJECTS

240+

WHOLE LIFE COST

£800 Billion+

INFRASTRUCTURE FOCUS

£450 Billion

TRANSFORMATION PROJECTS

70+

Long-Term Commitment

Over 80% of the GMPP budget is allocated to projects with a delivery timeline exceeding five years,

demonstrating the long-term nature of our national investments.

Government Major Projects Portfolio

Page 4

Governance and Assurance Framework

NISTA employs a rigorous enterprise project governance framework. This includes independent

assurance reviews at key milestones, Integrated Assurance and Approval Plans (IAAPs), and the

'Three Lines of Defence' model. We provide the Cabinet Office and HM Treasury with the visibility

required to make data-driven investment decisions.

Strategic Alignment

This category is aligned with the National Infrastructure Strategy and the government's digital

transformation roadmap, ensuring that every pound spent drives national growth and resilience.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 5

Delivery Confidence Assessment

(RAG)

The Red-Amber-Green (RAG) rating system is the cornerstone of our transparency. Each project is

assigned a rating based on its likelihood of successful delivery: Green (Highly Likely), Amber

(Feasible), and Red (High Risk). This methodology allows NISTA to deploy targeted interventions

where support is most needed.

Actionable Assurance

A 'Red' rating is not a failure; it is a signal for urgent intervention. NISTA works with departments to

re-scope, re-fund, or re-plan high-risk projects to get them back on track before they reach critical

delivery phases.

Government Major Projects Portfolio

Page 6

Infrastructure & Construction

This category includes massive physical builds such as High Speed 2 (HS2), Northern Powerhouse

Rail, and the New Hospital Programme. These projects are vital for regional 'levelling up' and the

transition to a Net Zero economy by 2050.

Strategic Alignment

This category is aligned with the National Infrastructure Strategy and the government's digital

transformation roadmap, ensuring that every pound spent drives national growth and resilience.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 7

Military Capability Initiatives

Overseen in collaboration with the Ministry of Defence, these projects include the Continuous At-Sea

Deterrent, the Type 26 Global Combat Ship, and the Future Combat Air System (FCAS). They are

essential for national security and sovereign manufacturing capabilities.

Strategic Alignment

This category is aligned with the National Infrastructure Strategy and the government's digital

transformation roadmap, ensuring that every pound spent drives national growth and resilience.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 8

Transformation & Service Delivery

Focusing on citizen-centric services, these programs include the DWP’s Health Transformation

Programme and the HMRC’s Making Tax Digital initiative. These projects aim to modernize how

government interacts with the public, increasing efficiency and reducing operational costs.

Strategic Alignment

This category is aligned with the National Infrastructure Strategy and the government's digital

transformation roadmap, ensuring that every pound spent drives national growth and resilience.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 9

ICT and Digital Modernization

Modernizing legacy IT systems is a critical priority. Projects in this category focus on cloud migration,

cybersecurity resilience, and the implementation of AI-driven data analytics across the civil service.

Strategic Alignment

This category is aligned with the National Infrastructure Strategy and the government's digital

transformation roadmap, ensuring that every pound spent drives national growth and resilience.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 10

Investment Priorities & Funding

Funding for the GMPP is allocated through the multi-year Spending Review process. NISTA works

with HM Treasury to ensure that capital is directed toward projects that demonstrate clear strategic

value and a high Benefit-Cost Ratio (BCR).

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 11

Risk Management and Mitigation

NISTA identifies systemic risks across the portfolio, such as inflationary pressures, supply chain

disruptions, and skilled labor shortages. We provide central oversight to mitigate these risks through

improved procurement strategies and professional development for Project Delivery Professionals.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 12

Cross-Government Coordination

Success in the GMPP requires seamless collaboration between departments. NISTA acts as the

central hub, facilitating knowledge sharing through the Major Projects Academy and

professionalizing the project delivery function across the Civil Service.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 13

Case Study: The Elizabeth Line Legacy

The completion and integration of the Elizabeth Line serves as a blueprint for large-scale

infrastructure. Lessons learned in digital signaling and complex stakeholder management are now

being applied to current GMPP rail projects.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 14

Key Milestones 2026-2030

The following roadmap outlines the critical path for the portfolio over the coming years, including the

transition to full NISTA operational authority.

2026

Full rollout of NISTA Transformation Framework

2027

Operational Readiness for the New Hospital Programme Phase 1

2028

Completion of major digital tax modernization milestones

2030

Strategic alignment with Net Zero interim targets

Government Major Projects Portfolio

Page 15

Portfolio Performance Trends

Long-term data indicates a steady improvement in the proportion of projects rated Amber or Green.

This reflects enhanced front-end loading and more realistic scheduling at the Business Case stage.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 16

Professionalizing Project Delivery

The Government Projects Academy is training the next generation of Senior Responsible Owners

(SROs). By 2026, 90% of SROs on GMPP projects will have completed the Major Projects

Leadership Academy (MPLA).

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 17

Environmental Sustainability in GMPP

NISTA mandates that all new infrastructure projects incorporate carbon assessments. This ensures

that the GMPP contributes directly to the UK’s statutory climate targets through sustainable

construction and biodiversity net gain.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 18

The Future of National Delivery

As we look toward 2030, NISTA will continue to evolve, embracing predictive data analytics and

machine learning to forecast project performance. Our focus remains unwavering: delivering the

infrastructure and services that power the UK.

Key Portfolio Objective:

To increase the proportion of projects successfully reaching 'Gate

5' (Operations Review) within the original budget profile.

Government Major Projects Portfolio

Page 19

Ensuring Excellence in Every

Project.

For more information, visit gov.uk/nista

Report based on the 2025/26 GMPP Annual Data and NISTA Policy Framework.

NISTA Government Major Projects Portfolio

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