Briefing Note: Green Book Review 2025 – Why It Matters for Councils and Public Sector Leaders

What is the ‘Green Book’ and why does it matter? 

The Green Book is HM Treasury’s guidance on how to appraise and evaluate public spending. It sets the standard for how councils and others make the case for funding. In July 2025, the Treasury published its latest review, responding to concerns that the guidance disadvantaged less affluent areas and created barriers to investment. 

Why now – and what does the Review say? 

The review explored whether the Green Book’s methodology favoured wealthier regions through higher land values or stronger benefit-cost ratios. While it found no systemic bias, it highlighted that overly complex guidance and inconsistent application often made it harder for less-resourced areas to develop strong business cases. 

Six areas for reform were identified, including simplifying appraisal guidance and improving support for those preparing business cases. Technical issues like discount rates and project lifetimes will be reviewed further. 

The key outcome: a shift to place-based thinking 

The most important shift is the move from narrow, standalone project cases e.g. “how do we increase 5G in town centres?” to more integrated, place-based investment plans that ask, “How can digital connectivity unlock growth, skills, health, education, and inclusion across this region?” 

Why this matters to you 

Treasury’s updated expectations mean councils will need to prepare high-level, portfolio business cases that: 

• Define strategic place-based objectives 

  
  

• Align with local priorities and national goals 

  
  

• Integrate delivery across departments and external partners (e.g. telecoms, housing, NHS) 

  
  

• Demonstrate cross-cutting impact and long-term value. 

  
  

How Intelligens Consulting can help 

We work with councils to develop Green Book-aligned business cases—whether for tactical digital interventions or wider strategic investment programmes. Our in-house team of economists is experienced in developing the Strategic Case for Change that underpins Treasury-compliant submissions. We help local authorities secure funding, shape stronger bids, and deliver place-based outcomes. 

📩 Contact us to future-proof your digital investment plans. 

Email: info@intelligensconsulting.com | Website: www.intelligensconsulting.com