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# UK and Norway sign Lunna House pact to counter Russian undersea threat
- URL: https://sovereigntymonitor.eu/news/2025-12-04-uk-norway-lunna-house-agreement/
- Published: 2025-12-04T12:00:00.000Z
- Updated: 2026-10-08T12:00:52.000Z
- Description: The UK and Norway signed the Lunna House Agreement on 4 December 2025 to operate their navies as one against Russian submarine and undersea sabotage threats. It covers a GBP 10 billion Type 26 frigate programme, joint patrols and Norwegian strike missile adoption by the UK.
- Author: Reidar Balstad
- Tags: Defence and space, #news, #verified, #editor-read

Verified Editor-read [GOV.UK press release, 4 December 2025](https://www.gov.uk/government/news/uk-and-norway-to-operate-together-to-counter-russian-undersea-threat-through-major-new-defence-agreement?ref=sovereigntymonitor.eu)

**What it does not test.** Does not establish that the GBP 10 billion frigate figure is new money rather than the previously announced Type 26 export order.

**How this item counts.** This item is dated before the index starts on 1 January 2026, so it does not count in the [European Sovereignty Index](https://sovereigntymonitor.eu/sovereignty-index/).

**How this item was made.** Drafted by an AI system (Claude (Anthropic)) from the source cited above; read and approved by the editor on 2026-10-07\. [How the record is made](https://sovereigntymonitor.eu/method/#how-the-record-is-made)