SELLAFIELD PRODUCT AND RESIDUE STORE RETREATMENT PLANT PROJECT

Rating: Compared to financial year 24/25 Q4, the NISTA/SRO Delivery Confidence Assessment (DCA) rating at 25/26 Q4 decreased to Amber. This is primarily due to the following factors: - Impact relating to the legislative changes of Passive Fire Protection standards and the implementation of the changes to the Building Safety Act (2022) following the Grenfell Tower Inquiry. The legislative changes will require a significant amount of engineering design rework and additional installation work in the new facility; the key impact is expected to be on the schedule to achieve readiness of the facility for Glove box installation. - The project has also been impacted by extraordinary inflation and Industrial Action. This will result in a request to DESNZ PIC for P80 cost and schedule contingency sanction relief when appropriate. This is essential to restore contingency levels necessary for project completion.

Schedule: Compared to financial year 24/25-Q4, the project's end-date at 25/26-Q4 increased from 01/04/2030 to 24/06/2031. This 15 month movement is reflective of the impact of legislative changes to Passive Fire Protection standards.

Cost: The increase to the project's departmentally agreed Whole Life Cost at 25/26-Q4 is primarily due to: - Annual Indexation, in line with the agreed indices.

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

Rating: Compared to financial year 23/24-Q4, the Infrastructure Project Authority's Delivery Confidence Assessment rating at 24/25-Q4 remained at GREEN. This is primarily due to the following factors‚ This is a complex nuclear project on an operational nuclear site. The Project is in the execution stage and continues with the final stages of bulk civil construction, is transitioning into mechanical and electrical fit out and is currently showing no significant threat to the overall P80 schedule. The SRP project is being delivered by the Programme and Project Partnership (PPP). The IPA afforded this project a RAG rating of GREEN.

Schedule: Compared to financial year 23/24-Q4, the project's end-date at 24/25-Q4 increased from 09/10/2029 to 01/04/2030. This is primarily due to the following factors‚ The project end date has moved as a result of baseline change for P80 drawdown due to delays incurred by the global shortage of microchips and semiconductors. This movement and the project end date remains within the overall P80 dates approved in the Full Business Case (FBC).

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 1433 to 1471. This is primarily due to the following factors‚ Compared to 23/24-Q4, the SRP budgeted cost (baseline) has increased by ~£38m, this is due to £21m of escalation in line with agreed indices, and £17m as a result of baseline change for P80 drawdown due to delays incurred by the global shortage of microchips and semiconductors.

Source: NISTA Annual Report 2024-25 (data)

Rating: Compared to financial year 22/23-Q4, the Delivery Confidence Assessment rating at 23/24-Q4 remained at Green(IPA rating). This is primarily due to the following factors. This is a complex, "first of a kind" nuclear project, and as such has a high degree of delivery risk. Earlier this financial year the IPA completed their annual independent 'Gate 0' review affording the SRP Project a DCA Rating of Green.

Schedule: Compared to financial year 22/23-Q4, the project's end-date at 23/24-Q4 remained schedule to finish on 2029-10-09. This is primarily due to the following factors. There has been no movement to the projects end date.

Cost: Compared to financial year 22/23-Q4, the project's departmental-agree Whole Life Cost at 23/24-Q4 increased from 1380m. to 1433m. This is primarily due to the following factors. The SRP budgeted cost (baseline) has increased by 52m. This is due to escalation in line with the agreed indices.

Source: IPA Annual Report 2023-24 (data)