Clyde Infrastructure

Military Capability

Record date: 31 March 2026

Whole-life cost: £3.3bn
Published schedule: 07/09/2015 – 01/04/2032
NISTA delivery confidence: AMBER
Senior responsible owner: Andrew Tims

What the project is for

The HMNB Clyde Infrastructure Programme (CIP) has been established to manage the design, delivery and transition into operational use, new build and updated infrastructure facilities at HMNB Clyde. In order to: enable the continued safe and secure operation of submarines; support the arrival of the next generation Dreadnought SSBNs; and create a single submarine centre of specialisation. With an estimated budget of £3.3Bn, it is a programme of strategic national importance that is critical to sustaining Continuous At Sea Deterrence, and the safe, sustainable and cost effective operation of the Submarine Force. The end state of the programme will be “An integrated submarine operating base at Clyde, supporting a Submarine Force that is safe, secure, sustainable and resilient, and ready to excel in operations out to 2067.

Departmental delivery commentary

Compared to financial year 24/25 Q4, the NISTA/SRO Delivery Confidence Assessment (DCA) rating at 25/26 Q4 remained at Amber. This is primarily due to the following factors. 1. The Delivery Confidence Assessment reflects successful completion of nine projects by the programme team up to 2025/26. 2. Despite recent successes, our resource position remains a risk. We continue to face challenges in recruiting sufficient staff and securing the level of industry support required to sustain delivery. Resourcing needs will have to be proactively managed to ensure we can maintain momentum and meet our commitments.

Schedule

Compared to financial year 24/25-Q4, the programme end-date at 25/26-Q4 remained the same at 01/04/2032.

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 £1876.3M to £3287.2M. This is primarily due to the following factors. 1. The forecast Whole Life Costs has increased to reflect new requirements and improved understanding of the conditions of the existing infrastructures and the levels of intervention required to achieve the required programme outcomes.

Benefits

Compared to financial year 24/25-Q4, the project's departmentally agreed Benefits at 25/26-Q4 (measured in £m) remained at 0. This is primarily due to the following factors. No monetised benefits.