National Security Strategy And Strategic Defenc... May 2026

The 2015 UK National Security Strategy and Strategic Defence and Security Review (SDSR) established a 10-year, £178 billion plan prioritizing economic security, state-based threats, and defense funding. While combining policy and capability, the review faced scrutiny for failing to address the implications of Brexit and the potential for a disjointed, broad-scope strategy. A new review is scheduled for 2025 to align with evolving security challenges. Read more from the UK Parliament 2015 review PDF .