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# Keel laid for UK's third Type 31 frigate HMS Formidable at Rosyth
- URL: https://sovereigntymonitor.eu/news/2025-12-09-uk-type31-third-frigate-keel-laid/
- Published: 2025-12-09T12:00:00.000Z
- Updated: 2026-10-08T12:01:06.000Z
- Description: Babcock laid the keel of HMS Formidable, the third of five Type 31 frigates being built at Rosyth for the Royal Navy, marking the start of the ship's main construction phase.
- Author: Reidar Balstad
- Tags: Defence and space, #news, #reported, #editor-read

Reported Editor-read [Navy Lookout, 9 December 2025](https://www.navylookout.com/keel-laid-for-third-type-31-frigate-hms-formidable/?ref=sovereigntymonitor.eu)

**What it does not test.** It does not establish any change to the programme's delivery dates or cost, only that construction of this hull has begun.

**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)