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HMNB Clyde

Operating base in Scotland for the Royal Navy

HMNB Clyde

Operating base in Scotland for the Royal Navy

FieldValue
nameHMNB Clyde
ensignNaval Ensign of the United Kingdom.svg
partof
locationGare Loch, Argyll and Bute, Scotland
imageFile:HMNB Clyde.jpg
captionAn aerial view of HMNB Clyde
image2
typeNaval base
coordinates
pushpin_mapScotland Argyll and Bute#UK
pushpin_map_captionLocation in Argyll and Bute
pushpin_labelHMNB Clyde
pushpin_label_positionleft
ownershipMinistry of Defence
operatorRoyal Navy
controlledbyNaval Base Commander, Clyde
open_to_public
site_other_label
site_other
site_area87 hectare
code
built1940s
used1940s–present
height
length
fate
conditionOperational
current_commanderCommodore Sharon Malkin: December 2022 – present
past_commanders
garrisonSubmarine Service
occupants
websiteHMMB Clyde - Royal Navy
footnotes

His Majesty's Naval Base, Clyde (HMNB Clyde; also **HMS ''Neptune'''''), primarily sited at **Faslane''' on the Gare Loch, is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Devonport and HMNB Portsmouth). It is the navy's headquarters in Scotland and is best known as the home of Britain's nuclear weapons, in the form of nuclear submarines armed with Trident missiles.

History

Faslane was first constructed and used as a base in the Second World War. During the 1960s, the British Government began negotiating the Polaris Sales Agreement with the United States regarding the purchase of a Polaris missile system to fire British-built nuclear weapons from five specially constructed submarines. In the end, only four were constructed; , , and . These four submarines were permanently based at Faslane.

Faslane itself was chosen to host these vessels at the height of the Cold War because of its geographic position, which forms a bastion on the relatively secluded but deep and easily navigable Gare Loch and Firth of Clyde on the west coast of Scotland. This position provides for rapid and stealthy access through the North Channel to the submarine patrolling areas in the North Atlantic, through the GIUK gap to the Norwegian Sea. At the time it was chosen, the location was also close to the American SSBN base at Holy Loch, which operated 1961–1992. One boat was always on patrol at any given time.

In 1971, the base was home to the 3rd Submarine Squadron of Nuclear Fleet and Diesel Patrol Submarines, "the fighters", and the 10th Submarine Squadron consisting of the four Polaris submarines, "the bombers".

In Command

Main article: Naval Base Commander, Clyde

Based vessels and units

The following notable vessels and units are based at Faslane.

Royal Navy

Commodore J. L. Perks OBE, Commander Submarine Flotilla/(Commodore Submarine Service (COSM))

Vanguard-class SSBNs

  • Astute-class SSNs
    • HMS Astute
    • HMS Ambush
    • HMS Artful
    • HMS Audacious
    • HMS Anson
    • HMS Agamemnon (as of September 2025, remains at BAE systems shipyard in pre-sea trial testing; to be based at HMNB Clyde in due course)
  • Sandown-class mine countermeasures vessel:
    • HMS Bangor (preparing for refit as of late 2025)
  • Faslane Patrol Boat Squadron (Archer-class patrol vessels):

  • Northern Diving Group
    • 1 x Sea-class 15m diving support boat
  • Mine Threat and Exploitation Group
    • Arcims-class autonomous vessels
      • RNMB Hebe
      • RNMB Hydra
      • RNMB Hussar
      • RNMB Hazard
      • RNMB Harrier (forward deployed with 9 MCM Squadron at HMS Jufair, Bahrain in 2023)
      • RNMB Halcyon
      • RNMB Hellcat
  • Four vessels (Halcyon, Hussar, Hydra and Harrier) enabled for autonomous/uncrewed operations. Hebe accommodates a Portable Operations Centre Afloat that allows command & control of autonomous operations. The other vessels have been employed as crewed workboats for route surveys in the U.K. and elsewhere, as well as for trials of small uncrewed underwater vehicles (UUVs).

    Royal Marines (UK Commando Force)

    Serco Marine Services

    • Multicat 2613-class utility boat
      • SD Angeline
    • Coastal oilers
      • SD Oilman
      • SD Waterpress
    • Impulse-class tugs
      • SD Impulse (A344)
      • SD Impetus (A345)
    • ATD 2909-class tugs
      • SD Reliable
      • SD Resourceful
      • SD Dependable
    • STAN 2608-class tugs
      • SD Jupiter
    • Oban-class tenders
      • SD Oronsay
      • SD Omagh
    • Personnel ferries
      • SD Eva
    • STAN 1505-class tenders
      • SD Clyde Racer
    • STAN 1905-class tenders
      • SD Clyde Spirit

    Ministry of Defence Police

    • Clyde Marine Unit
      • Island-class patrol vessels
        • Iona
        • Skye
        • Lismore
        • Barra
        • Harris
        • Jura
    • Nuclear Division (Faslane Station)
    • Central Support Group

    Role and operations

    HMS ''Vigilant'' alongside Faslane Naval Base.
    HMS ''Astute'' arriving at Faslane for the first time.

    HMNB Clyde lies on the eastern shore of Gare Loch in Argyll and Bute, to the north of the Firth of Clyde and 25 mi west of Glasgow. The submarine base encompasses a number of separate sites, the primary two being:

    • Faslane, 25 miles from Glasgow;
    • RNAD Coulport, beside Loch Long, 2 mi west of Faslane.

    Faslane is also a Defence Equipment and Support site, operated in dual site organisation with Great Harbour, Greenock, by Babcock Marine and Technology, and managed by Serco Denholm.

    Arleigh Burke}} departing HMNB Clyde

    The naval shore establishment at Faslane is HMS Neptune. Naval personnel appointed to the base who do not belong to a seagoing vessel make up Ship's Company. Both the Gareloch and Loch Long are sea lochs extending northwards from the Firth of Clyde. The base serves as home base to Britain's fleet of nuclear-powered and nuclear-armed submarines, as well as conventionally armed nuclear-powered submarines, supported by the 43 Commando Fleet Protection Group Royal Marines.

    In command of HMNB Clyde is the Naval Base Commander (Clyde), Commodore Sharon Malkin. The base is home to a number of lodger units including Flag Officer Scotland and Northern Ireland (FOSNI) (who is also Rear Admiral Submarines), the Northern Diving Group and the Scottish Headquarters of the Ministry of Defence Police. It is base to 3,000 service personnel, 800 of their families and 4,000 civilian workers, largely from Babcock Marine, forming a major part of the economy of Argyll and Bute and West Dunbartonshire.

    In 2018, the Secretary of State for Scotland at the time, David Mundell said: "The UK’s entire submarine fleet will be based at Faslane by 2020. This will reinforce Scotland’s vital role in protecting our country, and guarantee skilled, secure jobs on the Clyde for years to come."

    Safety and accidents at Faslane

    Exercise Evening Star is the annual test of the emergency response routines to a nuclear weapon accident at Faslane. It is conducted by the Office for Nuclear Regulation. In 2011 the test failed as "a number of command and control aspects of the exercise were not considered to have been adequately demonstrated".

    In 2013–14 there were 99 radiation accidents concerning nuclear reactors, and 6 with nuclear weapons. These are the highest numbers for at least six years. The MoD maintains that there was no risk to the public as most of them were minor accidents. The SNP defence spokesman, Angus Robertson, called the figures "totally shocking".

    In 2015 the MOD argued that it was "entirely misleading" to focus only on the number of incidents, because they include "very minor issues such as the failure to fill out the correct form before painting works began." Indeed, the MOD stated that this "rigorous system shows how seriously MoD takes all aspects of nuclear safety, ensuring lessons are learned, and we can be clear that none of the events in the reports posed any risk to the health of our personnel, or to any members of the public." Indeed, one of the recorded events was the incorrect labeling of an empty pallet. Minor events were reported and investigated so that performance could be continuously improved. "This comprehensive, independent recording process allows Clyde to maintain a robust reporting culture, undertake learning from experience and to take early corrective action," the UK Defence Minister, Philip Dunne, told MPs.

    In August 2025, Defence Procurement Minister Maria Eagle announced that a Category A event had occurred at the base between January and April 2025, defined as an incident with "actual or high potential for radioactive release to the environment". She would not provide details for national security reasons. She also stated two Category B events ("contained radiation exposure") and 100 Category C and D failures had occurred between 22 April 2024 and 22 April 2025. All the events were at International Nuclear and Radiological Event Scale level one and no staff or public were harmed.

    Anti-nuclear demonstrations

    Given the presence of these nuclear capable missiles, Faslane has attracted demonstrations by Campaign for Nuclear Disarmament and other Scottish pressure groups, including Trident Ploughshares. Since 1982, a permanent peace camp is outside the base gates, where there are frequent demonstrations and regular Wednesday protests. The presence of Faslane is also an issue in Scottish politics.

    The Scottish National Party (SNP), the Scottish Socialist Party (SSP), and the Scottish Greens all oppose the deployment of nuclear weapons although the SNP have made assurances that they would retain the base for the servicing of conventionally armed and conventionally powered naval units. Members of those parties and indeed some from the Labour Party are often present at rallies. Also, some former independents, such as George Galloway attend rallies outside Faslane.

    Faslane 365

    The Faslane 365 campaign was a one-year protest at the base. It was a civil resistance initiative to apply critical public pressure for the disarmament of Britain's nuclear weapons.

    The campaign was launched in September 2006, with the first protest action commencing on 1 October 2006 carried out by a campaigning group of women associated with protests at Greenham Common. It formally ended with a "Big Blockade" on 1 October 2007.

    131 blockading groups took part in Faslane 365 and 1150 arrests were made.

    References

    References

    1. "Naval base gets female commander in wake of submarine abuse accusations". [[The Daily Telegraph]].
    2. "Resolution". Global Security.
    3. (20 January 2016). "Successor submarine programme: factsheet". Ministry of Defence.
    4. Royal Naval Engineers Benevolent Society, [http://www.rnebs.co.uk/Files/Courageous%20Special.pdf Society Members' Bulletin: Special Edition: HMS Courageous] {{Webarchive. link. (25 October 2014 , September 2013, p.5)
    5. "Clyde Naval Base".
    6. "HMS Pursuer (P273)".
    7. "Queen's Harbour Master Cylde – Marine Unit".
    8. "Marine Units".
    9. "Central Support Group (CSG)".
    10. (1 January 2020). "Submariners Association Newsletter in Depth 67". Submariners Association.
    11. "Sixth and final support boat delivered to Royal Navy diving group".
    12. "SEA Class Marine Craft".
    13. (13 February 2023). "Autonomous minehunting vessel RNMB Harrier has arrived in Bahrain and will be based on @RFACardiganBay".
    14. (February 2023). "Royal Navy Fleet Poster p.21".
    15. (30 March 2023). "Royal Navy autonomous mine hunting at the sharp end".
    16. Molinelli, Gabriele. (16 July 2025). "TKMS Atlas completes deliveries of 3 SWEEP systems for the Royal Navy Mine CounterMeasures capability".
    17. "A photo of RNMB HELLCAT conducting ROV missions yesterday taken by the crew of RNMB HEBE".
    18. (13 July 2023). "@NavyLookout SMB (Survey Motor Boat) Shackleton and RNMB (Royal Navy Motor Boat - mine warfare) Hellcat outbound from Faslane at Rhu this morning".
    19. Scott, Richard. (12 September 2025). "Royal Navy brings mine sweeping back into the fleet".
    20. Molinelli, Gabriele. (16 July 2025). "TKMS Atlas completes deliveries of 3 SWEEP systems for the Royal Navy Mine CounterMeasures capability".
    21. (29 July 2025). "In focus: Royal Navy minesweeping capability restored".
    22. (2 September 2009). "Babcock Marine Holds a Unique Export Position". Defpro.
    23. "Marine Services Planning Agreement".
    24. "Maritime Journal: Serco Denholm Awarded MOD Contract".
    25. "Marine Services". Serco.
    26. "43 Commando resurrected as historic Royal Marines unit returns".
    27. (31 August 2015). "What do we know about Faslane, the home of Trident nuclear weapons?". BBC.
    28. (2018-02-26). "Faslane expansion plans 'well received in the local area', says MoD". UK Defence Journal.
    29. "HM Naval Base Clyde – Quarterly report for 1 July 2011 to 30 September 2011". Office for Nuclear Regulation, Health and Safety Executive.
    30. (1 March 2015). "Radiation safety breaches up 50% in one year at Scotland's nuclear bomb bases". Herald Scotland.
    31. (1 March 2015). "Radiation safety breaches up 50% in one year at Scotland's nuclear bomb bases". The Herald.
    32. Mitchell, Jenness. (14 August 2025). "MoD urged to reveal details of nuclear incident at Faslane". Sky News.
    33. (19 August 2025). "Nuclear incident at UK sub base". Nuclear Engineering International.
    34. (31 August 2015). "SNP rails against Osborne's Faslane investment". FT.
    35. (22 October 2001). "Faslane protest sparks 170 arrests". BBC.
    36. "Faslane 365".
    37. (2 October 2007). "Faslane 365 – the big blockade". Greenpeace.
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