MARSHALL

Rating: Compared to financial year 24/25 Q4, the NISTA/SRO Delivery Confidence Assessment (DCA) rating at 25/26 Q4 decreased to RED. This is primarily due to the following factors. 1. The Programme is seeking to resolve several commercial issues with the preferred option subject to Investment Approval Committee in the early part of FY26/27. Although new equipment delivery stands at over 92% and Notice of Service Availability, the key indicator toward Full Operating Capability (FOC), is over 50%, there are five equipment installation outliers that will not deliver by the currently approved 31 Oct 26 date.

Schedule: Compared to financial year 24/25-Q4, the programme's end-date at 25/26-Q4 remained the same at 31/10/2026. This is primarily due to the following factors. 1. Although the reported end date remains unchanged from Q4 24/25, the Programme will be seeking approval for a revised Full Operating Capability and Programme end date.

Cost: Compared to financial year 24/25-Q4, the project's departmentally agreed Whole Life Cost at 25/26-Q4 (measured in £m) increased from £1828M to £1870M. This is primarily due to the following factors. 1. This uplift reflects the increase in Programme scope to include additional safety critical and operationally essential change required by the Front Line Commands, and delays from previous FYs and added risk because of emerging changes. 2. However, the Programme continues to remain affordable and within its Approved Budgetary Level.

Source: NISTA Major Projects Annual Report 2025-26 (data)

Rating: Compared to financial year 23/24-Q4, the Delivery Confidence Assessment rating at 24/25-Q4 remained at AMBER. This is primarily due to the following factors. Work continues to address the known risks and issues with resolution being sought in conjunction with the Delivery Team and the Contractor. Accessing sufficiently qualified and experienced people to deliver critical network migration issues such as the BT Withdrawal of Analogue and Kilostream services and Synchronised Digital Hierarchy are a concern, as well as funding decisions imposed on the Programme following MOD Centre arbitration. St Kilda, the Falklands, and Gibraltar are impacted by the above impending issue also.

Schedule: Compared to financial year 23/24-Q4, the project's end-date at 24/25-Q4 remained at 31/10/2026. This is primarily due to the following factors. No change in project end-date.

Cost: Compared to financial year 23/24-Q4, the project's departmentally agreed Whole Life Cost at 24/25-Q4 (measured in £m) increased from 1774 to 1828. This is primarily due to the following factors. This uplift reflects the increase in programme scope to include additional safety critical and operationally essential change required by the Front Line Commands. The Programme remains affordable and within the Approved Budgetary Level.

Source: NISTA Annual Report 2024-25 (data)

Rating: Compared to financial year 22/23-Q4, the Senior Responsible Owner's Delivery Confidence Assessment rating at 23/24-Q4 remained at Amber. This is primarily due to the following factors. The Programme Delivery Confidence Assessment remains Amber although with an improving trend. Work continues to address the known risks and issues which appear resolvable at this stage. Elsewhere, Hub and Satellite operations from the Terminal Air Traffic Control Centre (TATCC) (East) at Marham began in Apr 23 with the transfer of Wittering radar services. The first Hub and Satellite operations from TATCC (South) commenced in Jun 23 when Benson radar services relocated to Brize Norton.

Schedule: Compared to financial year 22/23-Q4, the project's end-date at 23/24-Q4 increased from 2024-12-31 to 2026-10-31. This is primarily due to the following factors. Adjustments in the delivery of new equipment to some Programme outliers has necessitated a slip in the Programme’s Full Operating Capability (FOC) and Programme Closure milestones. These changes will not result in any cost increase nor operational impact. Potential mitigating options are being explored to bring forward equipment delivery against the revised FOC date.

Cost: Compared to financial year 22/23-Q4, the project's departmental-agree Whole Life Cost at 23/24-Q4 increased from 1573m to 1774m. This uplift reflects the increase in programme scope to include safety critical and operationally essential change required by the Front Line Commands. The programme remains affordable.

Source: IPA Annual Report 2023-24 (data)