BRIMSTONE 3

Military Capability

Record date: 31 March 2026

Whole-life cost: Not disclosed
Published schedule: 23/03/2017 – 31/01/2031
NISTA delivery confidence: Not disclosed
Senior responsible owner: Air Cdre Alun Roberts

What the project is for

Brimstone 3 (B3) sustains the precise, low-collateral air-to-surface Brimstone capability on the Typhoon platform, it is also being integrated onto the Protector platform.

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. While awaiting formal endorsement of the revised programme baseline, it continues to manage resourcing constraints and finalisation of the operational safety case. 2. Key progress has been made, including continued stability of the schedule, safety case advancement and programme maturity.

Schedule

Compared to financial year 24/25-Q4, the programme's end-date at 25/26-Q4 remained the same at 31/12/2028.

Cost

Exempt under Section 43 - Commercial interests

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.