The Crown Consulting Group

Legacy systems sit at the heart of many government services. Replacing them is rarely simple — and often risky. Drawing on real delivery experience, this article explores practical, service-led strategies for modernising legacy technology while protecting continuity, improving user outcomes and building lasting digital capability within public sector organisations.

Retiring legacy systems in the public sector is complex and high risk. In this case study, we share how we supported a central government organisation to decommission an outdated platform while protecting service continuity, safeguarding data and strengthening security. Through structured discovery, phased migration and close collaboration, we reduced operational risk and enabled long-term digital transformation.

Digital identity sits at the heart of modern public services, yet it remains one of the hardest problems to get right. As services become more joined-up, identity can no longer be treated as a technical afterthought. This article explores how digital identity is evolving, what it means for citizens and Government, and why inclusive, proportionate design is critical to sustainable public sector services.

Legacy system replacement is rarely a single technical decision. This case study explores how a service-led, evidence-based approach helped a public sector organisation assess risk, understand user impact, and design a pragmatic, phased roadmap for modernisation — while protecting live services and building internal capability.

How our consultancy helped a government department streamline digital procurement — reducing delays and improving delivery, without compromising compliance.