HMNB Portsmouth
Operating base in the United Kingdom for the Royal Navy
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| 2025 | Expected decommissioning of HMS Lancaster after completing her Persian Gulf deployment, which would end the basing of Type 23 frigates at Portsmouth. |
| 2025 | HMS Iron Duke confirmed to relocate from Portsmouth to Devonport naval base. |
| March 2025 | Planned retirement date for both HMS Albion and HMS Bulwark landing platform dock ships |
| March 2025 | RFA Wave Ruler and RFA Wave Knight scheduled to be retired from naval service, with both vessels currently in extended readiness (uncrewed reserve). |
| March 2025 | Type 23 frigates scheduled to be retired by this month. |
| January 2025 | HMS Talent, a Trafalgar-class submarine based at HMNB Devonport, is scheduled for decommissioning in early 2025. |
| January 2025 | Expected retirement of HMS Triumph, marking the end of attack submarine operations at Devonport Naval Base. |
| 2024 | HMS Richmond became a Devonport ship after completing her refit. |
| 2024 | Multiple Type 45 destroyers were scheduled to complete their refit and return to the Royal Navy fleet. |
| 2024 | Commodore Marcel Rosenberg ADC assumes leadership as Naval Base Commander, succeeding Commodore John Voyce |
| 2024 | Type 45 destroyer expected to complete refit and return to the fleet |
| 2024 | HMS Westminster retired from active service. |
| 2024 | HMS Argyll retired from active service. |
| November 2024 | Decision made to retire the Albion-class assault ships previously based at Devonport. |
| November 2024 | HMS Bulwark landing platform dock was earmarked for retirement by March 2025 during its scheduled regeneration refit |
| 2023 | HMS Montrose was decommissioned. HMS Argyll and Westminster also decommissioned. |
| 2023 | Two ships entered refit at HMNB Portsmouth, with scheduled major upgrade work extending until 2026. |
| 2023 | Type 45 destroyer entered refit, scheduled for major upgrade work until 2026 |
| 2023 | HMS Montrose decommissioned. |
| 2022 | HMNB Portsmouth began hosting an experimental vessel in Royal Navy service, marking a new phase of naval technological innovation and testing. |
| 2022 | Some Type 23 frigates were forward deployed to Bahrain for a 3-year period. |
| 2022 | Morice Yard became the headquarters of Surface Fleet Command within the operational Naval Base. |
| 2022 | A report was conducted to identify areas of improvement to help the base move out of enhanced monitoring. |
| 2022 | Babcock began a ten-year programme to upgrade Devonport Dockyard facilities, focusing on infrastructure refurbishment of nuclear licensed docking and berthing facilities, particularly around No. 5 Basin and Dry Docks 8, 9, 10, 11, 12, 14, and 15. |
| 2022 | Brigadier Mike Tanner became the first Royal Marine officer to be appointed as commander of HMNB Devonport, breaking the historical precedent of Royal Navy commanders leading the base. |
| December 2022 | UK government approved South Yard as one of three 'freezones' of the Plymouth and South Devon Freeport, providing tax advantages for businesses in the area. |
| June 2022 | Commodore John Voyce became the Naval Base Commander (NBC) of HMNB Portsmouth. |
| 2021 | HMS Trent was forward deployed from Gibraltar |
| 2021 | HMS Spey and HMS Tamar were forward deployed to the Indo-Pacific region, with their primary logistics hub at the British Defence Singapore Support Unit in Singapore. |
| 2021 | HMS Montrose was forward deployed from Gibraltar. |
| 2021 | HMS Tamar was forward deployed from Gibraltar. |
| 2021 | HMS Spey was forward deployed to the Indo-Pacific region, establishing a primary logistics hub at the British Defence Singapore Support Unit in Singapore. |
| 2021 | HMS Monmouth retired from active service. |
| 2021 | Phase 2 of Oceansgate development is completed, further expanding the marine industry and technology hub. |
| 2020 | HMS Tamar was forward deployed to the Caribbean |
| 2020 | HMS Medway was forward deployed to the Caribbean. |
| 2020 | HMS Spey was forward deployed to the Caribbean region. |
| 2019 | HMS Medway was forward deployed to the Falklands as a guard ship |
| 2019 | HMS Spey was forward deployed to the Falklands as a guard ship. |
| 2019 | Commodore Jeremy Bailey ADC becomes Naval Base Commander, succeeding Commodore Jim Higham |
| 2019 | HMS Prince of Wales arrived in Portsmouth, completing the deployment of the two Queen Elizabeth-class aircraft carriers. |
| 2019 | HMS Forth was forward deployed to the Falklands as a guard ship. |
| 2019 | The National Audit Office reported that the costs of laid-up storage for all nuclear submarines had reached £500 million, with a total liability of £7.5 billion. |
| July 2019 | HMS St Albans moved to Devonport in preparation for her major refit. |
| 2018 | Commodore Jim Higham OBE ADC assumes leadership as Naval Base Commander, replacing Commodore Jeremy Rigby |
| 2018 | Defence Secretary announced that the new Type 26 frigates would be based at Devonport when delivered starting in the latter 2020s. |
| 2018 | The National Museum of the Royal Navy announced a 12-year plan to establish a full-time visitor attraction in Devonport, which includes creating a museum in the Officers' Terrace and preserving the decommissioned HMS Courageous submarine in the historic No. 1 Dry Dock. |
| 2018 | Phase 1 of Oceansgate development (east of the 18th-century dockyard wall) is completed, with new offices and business units designated as an Enterprise Zone. |
| 2018 | Thirteen out-of-service nuclear submarines were stored at Devonport, and the UK Parliament's Public Accounts Committee criticized the slow rate of their decommissioning. |
| 2017 | HMS Queen Elizabeth arrived in Portsmouth as part of the new aircraft carrier deployment. |
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This contents of the box above is based on material from the Wikipedia articles HMNB Devonport & HMNB Portsmouth, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.