Legacy IT

How Crown Hosting supports legacy IT modernisation in the public sector

Guide
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12 page PDF
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September 29, 2026
How Crown Hosting supports legacy IT modernisation in the public sector

Where Crown Hosting fits in the government's Legacy IT Risk Assessment Framework, when to use it, what it costs and how to access it. Written for public sector technology leaders.

Legacy IT increases operational, financial and cyber risk, and it delays modernisation. This guide explains where Crown Hosting fits in the government's Legacy IT Risk Assessment Framework, which risks it addresses, when to consider it and how to access it.

Moving into Crown Hosting separates hosting risk from application risk. You deal with the estate first, keep services running, and modernise your applications at the right pace.

What the guide covers

  • Crown Hosting at a glance: 97 data halls across 12 data centres on three separate UK sites
  • The four outcomes it supports: resilience, sustainability, security and cost
  • A checklist of warning signs. If two or more apply to your estate, Crown Hosting is highly likely to help
  • The two ways to access it: directly through GCA RM6262, or through a supplier using the Industry Customer Pathway
  • How Crown Hosting maps to each legacy risk category
  • The five-step method used to migrate estates securely out of legacy facilities
  • Indicative framework pricing for a single cabinet and a dedicated data hall
  • Case studies from DWP, Derby City Council, UKSBS and British Transport Police

Key figures

  • DWP invested £108 million, paid it back in around nine months and saves £150 million a year
  • 99.999% availability, with independent A and B power paths and at least 72 hours of on-site fuel
  • Power use typically 75% lower than legacy on-premises estates
  • UKSBS moved its whole data centre in 55 hours

Who it is for

CIOs, CTOs, infrastructure and estates leads, and commercial teams running systems in server rooms, end-of-life facilities or third-party data centres that no longer meet their needs.

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