Section one: Contracting authority/entity
one.1) Name and addresses
Post Office Limited
London
EC2V7ER
Country
United Kingdom
Region code
UKI - London
Companies House
02154540
Internet address(es)
Main address
Section two: Object
two.1) Scope of the procurement
two.1.1) Title
1 Year Extension of the Horizon Services Agreement
two.1.2) Main CPV code
- 72000000 - IT services: consulting, software development, Internet and support
two.1.3) Type of contract
Services
two.2) Description
two.2.3) Place of performance
NUTS codes
- UKJ - South East (England)
- UKK - South West (England)
- UKN - Northern Ireland
two.2.4) Description of the procurement at the time of conclusion of the contract:
1 year extension of the Horizon Services agreement from 1st April 2026 to the 31st of March 2027. This Notice relates to a Modification to a Contract in accordance with Regulation 72(1)(b) of the Public Contracts Regulations 2015. Post Office Limited ("Post Office" or "the Authority") entered into an agreement with Fujitsu Services Limited ("FSL") dated 28th July 1999 ("Horizon Agreement") for the provision of certain services, including Services in respect of the HNG-X system ("Services"). The Horizon Agreement is due to expire on the 31st March 2026. In order to allow for continuity whilst we complete the procurement exercise and to begin the transition process away from FSL, an extension of an additional one year to 31st March 2027 is required. However, based on the transition plan from replacement supplier further extension of 6-12 months may be required.
The contract modification addressed by this Notice is for the continued provision of application and service management, maintenance, development and support services under an existing software and IT services agreement relating to Point of Sale/Service ('POS') customer facing transactions across multiple channels.
For a number of significant technical and economic reasons, a change of contractor would cause significant inconvenience and substantial duplication of costs for the Authority. The estimated value of the additional services under the modification is £41,000,000 GBP excl. VAT.
Additional upgrades to address legacy End of Service Life components is estimated at £3,000,000 is also included in the modification value. NB: Any investment will be subject to POL agreeing suitable work orders with FSL.
two.2.7) Duration of the contract, framework agreement, dynamic purchasing system or concession
Duration in months
12
Section four. Procedure
four.2) Administrative information
four.2.1) Contract award notice concerning this contract
Notice number: 2021/S 000-009752
Section five. Award of contract/concession
Contract No
C100147
five.2) Award of contract/concession
five.2.1) Date of conclusion of the contract/concession award decision:
4 November 2025
five.2.2) Information about tenders
The contract/concession has been awarded to a group of economic operators: No
five.2.3) Name and address of the contractor/concessionaire
Fujitsu Services Limited
Bracknell
Country
United Kingdom
NUTS code
- UKK - South West (England)
Companies House
00096056
The contractor/concessionaire is an SME
No
five.2.4) Information on value of the contract/lot/concession (at the time of conclusion of the contract;excluding VAT)
Total value of the procurement: £41,000,000
Section six. Complementary information
six.4) Procedures for review
six.4.1) Review body
Royal Courts of Justice
London
Country
United Kingdom
Section seven: Modifications to the contract/concession
seven.1) Description of the procurement after the modifications
seven.1.1) Main CPV code
- 72000000 - IT services: consulting, software development, Internet and support
seven.1.3) Place of performance
NUTS code
- UKJ - South East (England)
- UKK - South West (England)
- UKN - Northern Ireland
seven.1.4) Description of the procurement:
Continuing provision of application and service management, maintenance, development and support services under an existing software and IT services agreement relating to Point of Sale/Service ('POS') customer facing transactions across multiple channels. Other than the extension of the term of the agreement, all other terms and conditions shall remain the same with the exception of FSL obligations in respect of:
End of Service Life (EOSL) Impact and Relief Principles, improved Governance for better management, Removal of Redundant Clauses and Schedules, maintenance of software that resides on HNG-X system and licenses required, from the date of the execution of the modification; and
NB: Any investment will be subject to POL agreeing suitable work orders with FSL.
seven.1.5) Duration of the contract, framework agreement, dynamic purchasing system or concession
Duration in months
12
seven.1.6) Information on value of the contract/lot/concession (excluding VAT)
Total value of the contract/lot/concession:
£41,000,000
seven.1.7) Name and address of the contractor/concessionaire
Fujitsu Services Limited
Bracknell
Country
United Kingdom
NUTS code
- UKK - South West (England)
Companies House
00096056
The contractor/concessionaire is an SME
No
seven.2) Information about modifications
seven.2.1) Description of the modifications
Nature and extent of the modifications (with indication of possible earlier changes to the contract):
A one year extension of all Services from the 1st April 2026 to the 31st March 2027. Other than the extension of the term of the agreement, all other terms and conditions shall remain the same with the exception of FSL obligations in respect of:
End of Service Life (EOSL) components, improved Governance for better management, Removal of Redundant Clauses and Schedules, maintenance of software that resides on HNG-X system, licenses required, updated contractors used by FSL and replacement of the current Fujitsu Services WAN, from the date of the execution of the modification; and
Additional upgrades to address legacy End of Service Life components is estimated at £3,000,000 is also included in the modification value.
NB: Any investment will be subject to POL agreeing suitable work orders with FSL.
seven.2.2) Reasons for modification
Need for additional works, services or supplies by the original contractor/concessionaire.
Description of the economic or technical reasons and the inconvenience or duplication of cost preventing a change of contractor:
This notice relates to the modification of an existing contract under regulation 72(1)(b) of the Public Contracts Regulations 2015 ("PCR"). Post Office Limited ("POL") requires a 12-month extension to its contract with Fujitsu Services Limited ("FSL") for the provision of its core trading platform Horizon (the "Contract"), from 01 April 2026 to 31 March 2027.
The modification has become necessary because POL is in the process of procuring a replacement service provider ("Replacement Provider") to manage Horizon (the "Procurement") and that procurement activity and the mobilisation of the Replacement Provider will not be complete by 31 March 2026 when the Contract expires by effluxion of time. POL commenced the Procurement in the summer of 2025 and has been conducting the procedure at pace. POL expects that the Procurement will conclude and a new contract with the Replacement Provider put in place in Summer 2026 with transition activity commencing upon execution. It is necessary, therefore, to extend the Contract by 12 months to 31 March 2027. It would not have been possible for POL to have competed the opportunity to support Horizon during this period as any alternative tendered solution would not have been mobilised and transitioned to prior to 31st March 2026.
A change of contractor cannot be made for technical reasons. The existing Horizon system is a highly complex legacy platform, written in outdated versions of software languages, and incorporates five 'systems' in one (i.e., financial services, banking, government services, mails, and retail). Horizon is an aging platform and has an inflexible monolithic architecture that makes technology change difficult. It would not be possible to simply hand this system over to another supplier. A change of contractor would result in disproportionate technical difficulties in implementation as well as operation and maintenance. Furthermore, while there are other similar systems to Horizon available on the market, there are no alternative systems that currently meet all of Post Office's business needs without significant development or customisation. It would not, therefore, be technically possible to mobilise a replacement system before 31 March 2026. On that basis, there are technical reasons why a change of contractor cannot be made.
Changing contractor would cause significant inconvenience and duplication of costs. It would cause service disruption, cause significant data migration issues, require substantial business change at short notice, threaten continuity of service and create risk in the transfer of know-how. Furthermore, changing contractor would result in sunk costs, including an increase in run costs, dual running costs, and additional exit/transition costs.
The modification is less than 50% of the original contract value. The Horizon support agreement was originally valued at approximately £846,700,000. The maximum value of the extension, if all options are called on during its term is approximately £41,000,000. The increase is, therefore, approximately 4.8% of the original contract value.
In summary, a change of contractor cannot be made for technical or economic reasons and would cause substantial inconvenience and duplication of costs for the Post Office. The value of the extension is substantially less than 50% of the original contract value. Accordingly, Post Office is satisfied that the modification can be made under regulation 72(1)(b) of the PCR.
seven.2.3) Increase in price
Updated total contract value before the modifications (taking into account possible earlier contract modifications, price adaptions and average inflation)
Value excluding VAT: £2,438,000,000
Total contract value after the modifications
Value excluding VAT: £2,479,000,000