Summary

• OneView Commerce remains the selected supplier for the £169.2 million commercial EPOS contract, but the earliest signing date has moved to 22 August.
• Computer Weekly says Escher is challenging the award and seeking lost profits; the Post Office, Escher and DBT have declined to confirm or deny that claim.
• Procurement scrutiny is now running alongside a technically difficult migration away from Fujitsu and a legacy system embedded across thousands of branches.

The Post Office has extended the standstill around its Horizon software replacement again, leaving a £169.2 million contract with OneView Commerce unsigned while an unconfirmed supplier challenge adds another complication to the programme.

Computer Weekly, which obtained the new information from a source familiar with the procurement, says losing finalist Escher believes the contract was not properly awarded and is seeking compensation for profits it says it would have earned. The Post Office, Escher and the Department for Business and Trade declined to confirm or deny the claim, so the existence and precise form of any legal action remain unverified publicly.

The official outcome still identifies OneView Commerce as the winner of Lot 2, covering the commercial off-the-shelf electronic point-of-sale system intended to replace Horizon. A contract originally expected to be signed in June has gone through six standstill extensions, with 22 August now the earliest date at which the deal could be finalised.

A separate £322.8 million contract with Accenture has already been signed for Lot 1, covering operation of the existing estate and support for the transition away from Fujitsu. The Post Office therefore has one major supplier working on continuity while the software contract underpinning the future branch system remains unsettled.

Procurement scrutiny runs alongside legacy risk

Standstill periods give unsuccessful bidders an opportunity to challenge public procurement decisions before a contract becomes difficult to unwind, and the safeguard becomes particularly important around an award carrying this level of public money and scrutiny. The operational cost of delay is nevertheless greater here than in an ordinary software purchase because Horizon cannot simply be switched off while procurement questions are resolved.

Branches continue to depend on the existing estate, while migration planning has to co-ordinate the old and new suppliers, hardware, integrations and staff training. Each movement in the contract timetable can alter sequencing elsewhere in a programme that is already carrying the consequences of an earlier attempt to build a replacement internally.

Post Office chairman Nigel Railton told the Horizon inquiry that the previous in-house approach was “set up to fail”, arguing that the decision to escape Horizon had become confused with the task of building a future system. The subsequent move towards commercial software is intended to avoid creating another heavily bespoke platform, although purchasing an established product does not make the migration itself straightforward.

Commercial EPOS software still has to connect with branch processes, accounting data and other systems accumulated around Horizon. Customisation has to be controlled without forcing postmasters into workflows that do not fit the service, while testing has to carry a level of evidential rigour that would be expected after faults in historic Horizon data were treated with damaging certainty.

The migration extends beyond software

Replacing Horizon also requires the Post Office to unwind a long technology relationship with Fujitsu while maintaining continuity across a national branch network. Fujitsu’s continuing position elsewhere in public procurement has already raised questions about how government handles historic supplier failures, but the Horizon transition demonstrates how operational dependence can persist even after political confidence has gone.

The supplier dispute creates a different governance test. Pressure to move away from Horizon quickly cannot justify a procurement process that is unable to withstand scrutiny, while a prolonged challenge can itself increase transition cost and extend reliance on technology the organisation is trying to retire.

Until Escher or the Post Office publicly confirms the reported challenge, the most reliable evidence remains the repeated standstill extensions and the fact that OneView Commerce’s contract is still not signed. Those facts alone show a procurement that has not reached the settled position expected when a major replacement programme is ready to proceed.

The Post Office now has to resolve that uncertainty without allowing contract pressure to weaken the technical work that follows it. Escaping Horizon depends on a defensible supplier decision, but it also depends on data migration, testing and branch implementation being handled with far greater care than the history of the system gives anybody reason to take for granted.