| UK Cabinet Office — Nuclear Steering Group advances Northwood cooperation, 10 Nov 2026 | — | government |
| Élysée — Franco-British nuclear steering group communiqué, 10 Nov 2026 | — | news_article |
| UK Government — Northwood Declaration, 10 Jul 2025 | — | government |
| gov.uk/government/news/uk-france-deepen-nuclear-defence-ties-in-first-joint-exercise | — | government |
| gov.uk/government/news/statement-by-the-united-kingdom-on-uk-france-nuclear-policy-and-cooperation | — | government |
| Defence expenditures and NATO's five-percent commitment | NATO | report |
| sipri.org/publications/2026/sipri-fact-sheets/trends-world-military-expenditure-2025 | — | news_article |
| UK Government — First Nuclear Steering Group meeting, Dec 2025 | — | government |