HMRC creates £500m legacy tech and security programme after merging major projects


The Critical Platform Transformation project and Enterprise Security Programme, which aim to tackle technical debt and improve cyber posture, have now formally been combined to become the Technical Health Programme

HM Revenue and Customs has formally merged two technology programmes in its major project portfolio to create a single £500m initiative to help tackle legacy tech and improve cyber resilience.

The Critical Platform Transformation (CPT) project and Enterprise Security Programme (ESP) – which both form part of the government major project portfolio – have now been officially combined to become the Technical Health Programme (THP).

This merger was first recommended following a review last summer, and THP was created in September 2023. Newly published assessment documents reveal that HMRC chief executive Jim Harra last month signed off on the proposal to close CPT and formally unite it with ESP under the banner of the new programme.

The aim of bringing the two schemes together is to treat removing legacy tech and addressing other IT security challenges as part of a single objective, rather than as separate issues.

With a whole life delivery cost of £341m, CPT is the larger of the two schemes being merged. Its aim is to “modernise elements of the HMRC IT estate and reduce levels of technical debt”, Harra’s assessment says.

He adds: “The vision of the programme was to modernise HMRC’s IT infrastructure, to reduce the risk of IT incidents or failures and to ensure HMRC continues to deliver high quality services to customers, while also implementing long-term strategic change as required across systems by: remediating technical debt; fixing known technology problems to increase network/system resilience and security; [and] delivering sustained risk reduction.”


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Work began in April 2021, since when the project “has delivered several software, hardware, and component upgrades, whilst reducing HMRCs legacy IT estate”, according to the department’s most recent set of annual major project data.

The Enterprise Security Programme, meanwhile, “will improve the security of HMRC’s systems and processes by further strengthening our cybersecurity; build an increased level of resilience to emergency situations; improve our security culture and capability; and… increase digital inclusion”, the major project roundup says. ESP’s overall cost is pegged at £142m and delivery commenced in April 2022.

Both the projects being combined were scheduled to complete by 31 March 2025, and PublicTechnology understands that this target data remains unchanged now that the two are being delivered as a single programme.

In response to our enquiries, and HMRC spokesperson said: “These programmes are a priority for us as we continue to invest in our ongoing technology roadmap, allowing us to provide even better digital services in the future.”

In addition to taking on the plans of CPT and ESP in their entirety, the Technical Health Programme will also take on some “deliverables” from another of HMRC’s major projects: Securing our Technical Future (SoTF), which aims to remediate the department’s highest-priority security vulnerabilities and support its exit from three “ageing datacentres”.

SoTF has been reprioritised to focus on “the migration of critical national infrastructure services that support HMRC’s most important operational activities”.

“Deliverables no longer in scope for SoTF will either be taken forward by HMRC’s Technical Health Programme or… [will] seek alternative delivery vehicles,” according to departmental transparency documents.

Sam Trendall

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