Summary

• Post Office has awarded contracts to Accenture and One View Commerce as part of its Horizon replacement programme.
• Accenture will help take over operation of Horizon from Fujitsu, while both suppliers work on replacement systems.
• The transition is a major test of public technology procurement, operational continuity, and trust after one of the UK’s defining IT failures.

Post Office has named Accenture and One View Commerce as new suppliers in its programme to replace Horizon and transform technology across its branch network.

Accenture will work with Post Office and Fujitsu to transfer knowledge, processes, and key people so it can take over operation of the Horizon system. In parallel, Accenture and One View Commerce will work together on replacement systems designed to support postmasters and internal teams.

The announcement moves the Horizon replacement programme from procurement into transition. Horizon is not an ordinary legacy IT system. It sits at the centre of one of the UK’s worst miscarriages of justice, after faulty software and institutional failure contributed to the wrongful prosecution of sub-postmasters.

Post Office said the contract awards are part of a wider five-year transformation plan intended to create a digitally enabled and more sustainable business. The organisation has entered a mandatory standstill period with the suppliers, followed by expected contract signature in early June. It said there will be no immediate changes for branches, postmasters, partners, or colleagues, and that Fujitsu will continue supporting Horizon during the transition until its formal exit date.

The operational challenge is considerable. Post Office has to move away from a system associated with deep public harm while keeping a national branch network running. Continuity, auditability, data integrity, supplier accountability, and user trust are not separate programme-management headings; they are the substance of the work.

Replacement technology alone will not repair the damage created by Horizon. A modern retail and branch platform can improve operations, but the more difficult questions concern governance: how defects are reported, how user complaints are handled, how data is trusted, how suppliers are challenged, and how executives respond when technology fails in the real world.

The supplier choices also show the public sector’s continued dependence on large systems integrators and specialist retail software providers for complex service transformation. Accenture brings scale and transition capability. One View Commerce brings point-of-sale and retail platform expertise. Both will be operating in an environment where any failure will be judged not merely as a delivery delay, but through the history of Horizon itself.

The wider public-sector technology lesson is severe. Governments and public bodies are trying to modernise services while carrying decades of legacy systems, procurement habits, fragmented data, and fragile institutional trust. The Horizon scandal showed that IT failure can become legal, social, and democratic failure when technical claims are accepted without enough scrutiny.

The replacement programme therefore needs more than a new system architecture. It needs transparent assurance, strong supplier oversight, routes for frontline users to challenge system outputs, and a governance model that treats postmasters as operational stakeholders rather than passive endpoints of a central platform.

If Post Office manages the transition well, it can start to separate future service delivery from the failures of the past. If it does not, the new contracts will become another chapter in a public technology case study that has already done lasting damage to confidence in institutional IT.