The UK's HM Courts and Tribunals Service (HMCTS) has migrated its applications out of legacy data centers located in West London and Swindon.

In total, HMCTS migrated 37 applications, a project that began in 2020, and has scrapped some and updated others to be moved to cloud platforms, as per a report from The Register.

HMCTS has detailed its migration efforts in a blog post, writing that the new infrastructure "reduces the risk of system failures and enables us to implement security updates more efficiently."

In total, the 37 systems were previously operating on approximately 2,500 pieces of hardware in data centers located in Park Royal in West London, and another in Swindon. According to the post, "many of these were so old that finding replacement parts was nearly impossible. This created a fragile environment with single points of failure that could disrupt access to essential court services."

The migration effort has been ongoing since 2020, with each system having complex and varied technologies required.

The department previously awarded CGI a contract valued at £60m ($82m) in 2023 to help it keep 35 "business-critical" pieces of software running, which were described as heritage applications.

HMCTS said: "Applications that were no longer needed were decommissioned, while others were upgraded and moved to secure, cloud-based platforms. Another group of systems was moved to a specially created temporary hosting facility where they can continue to reliably and securely operate reliably and securely while we plan their eventual replacement or retirement."

Details of the cloud platforms used were not shared, but the Government is known to use all the major hyperscalers.

In addition, two systems were completely rebuilt: the Juror Digital system, which replaced three separate jury management tools, and the Digital Audio Recording Transcription and Storage system.

While the migration effort is complete, the HMCTS is now working on decommissioning the old systems.

The department added: "This transformation is about more than just replacing old equipment. We have built a foundation that enables continuous improvement, with new systems that are easier to update, more secure, and better connected.

"Our courts now have the technological backbone they need to grow and adapt as the needs of the justice system evolve – whether that is handling growing caseloads, introducing new services, or ensuring continuity in the face of disruptions."

Details of the data centers previously used by the HMCTS were not provided.

In Swindon, current operators include AWS, nLighten, Deep Green, and Carbon Z, while Equinix and PureDC operate data centers in Park Royal, West London.

The wider Ministry of Justice is a known customer of Crown Hosting, a JV between the UK government and Ark Data Centres. In June 2025, Atos was also awarded a £58 million ($78.48m) IT services contract with the department to provide platform and legacy services.