HMS Trent (P224): The Patrol Ship That Caught a Narco-Submarine

Built on the Clyde

HMS Trent was built by BAE Systems at their Govan shipyard, with steel first cut in October 2015, officially named in March 2018, and commissioned on 3 August 2020. After completing sea trials, she deployed to the Mediterranean for NATO Operation Sea Guardian before the 2021 defence white paper designated her permanently based at Gibraltar for Mediterranean and West African operations.

The First Warship Based at the Rock

Permanently based at Gibraltar is a short phrase covering something the Royal Navy had never actually done. Britain has held the Rock since 1704 and has kept a dockyard there for most of that time, but the ships using it were visitors: they arrived, refitted, refuelled and left. The standing naval presence was the Gibraltar Squadron, which consists of two fast patrol boats of sixteen metres and a handful of rigid inflatables, and which spends its time policing the anchorage and occasionally being crowded by Spanish patrol vessels. HMS Sabre (P285) is one of them, and the base itself has its own long account. Trent, at ninety metres and two thousand tonnes, is a different proposition entirely, and she is the first warship of any size to call the place home.

She was not singled out. The command paper that sent her there, Defence in a Competitive Age, published in March 2021, took all five Batch 2 River-class ships and scattered them: HMS Forth to the Falklands, HMS Medway to the Caribbean, HMS Tamar and HMS Spey to the Indo-Pacific, and Trent to the Mediterranean and West Africa. The idea behind it is called persistent presence, and the arithmetic is simple enough: a frigate sailing from Portsmouth to the Gulf of Guinea spends the better part of a month getting there and another getting back, whereas a ship already sitting at Gibraltar is four days from Dakar. Whether five lightly armed patrol ships are the right way to be present in five oceans is an argument that has run ever since. What is not in doubt is that Trent has been busy.

The Black Sea and the Gulf of Guinea

Arriving at Gibraltar in April 2021, Trent soon deployed to the Black Sea for training exercises with Ukrainian and allied navies under Operation Orbital, before turning her attention to the Gulf of Guinea, deploying with Royal Marines from 42 Commando aboard for counter-piracy operations in one of the world's most persistently dangerous waters for shipping.

Odesa, Seven Months Before the Invasion

The Black Sea deployment reads differently now than it did at the time. Trent went in twice in 2021, first in May, when the Russians publicly announced they were tracking her, and again in June, when she berthed at Odesa alongside HMS Defender. A memorandum of understanding on naval cooperation was signed aboard her in the presence of Admiral Oleksiy Neizhpapa, then as now the commander of the Ukrainian navy, and the British ambassador Melinda Simmons. She then took part in Exercise Sea Breeze, which ran from 28 June to 10 July 2021 and was the largest iteration in its history: some five thousand personnel, thirty ships and forty aircraft from more than thirty nations, practising submarine tracking and air defence in a sea that would be closed to all of them within a year.

Seven months later Russia invaded, Turkey invoked the Montreux Convention, and the Turkish straits shut to the warships of the belligerents while everyone else was politely asked to stay out. Trent was among the last Royal Navy ships to work in the Black Sea before that door closed, and the training she helped deliver went to a navy that lost most of its ships in the first days of the war and then spent three years sinking rather larger Russian ones with drones. What Montreux actually says, and how it has been applied, is set out in HMS Blyth (M111).

The Gulf of Guinea, where she went next in November 2021, earns its description without any help. The International Maritime Bureau counted 130 seafarers kidnapped there in 2020 in twenty-two separate attacks, which was over ninety-five per cent of every crew kidnapping in the world. The following year the raw numbers fell and the concentration got worse: every single seafarer taken hostage at sea anywhere on the planet in 2021 was taken in the Gulf of Guinea. Trent carried a specialist boarding team from 42 Commando, worked with the navies of Nigeria, Ghana, Senegal, Togo and Benin and with the Italian frigate Marceglia on the French-led Exercise Grand African Nemo, and spent a good deal of time simply talking to fishermen in the Niger Delta to learn what normal looked like there. Rather more than six billion pounds of British trade passes through those waters, which is the unromantic reason a British warship was in them.

A Difficult Stretch of Maintenance

Trent endured a particularly troubled period between 2022 and 2023, with repeated dry dock visits for undisclosed technical issues and the removal of her commanding officer in October 2022 over alleged inappropriate conduct, before finally returning to sea that May.

Hundreds of Millions in Cocaine

Deploying to the Caribbean in December 2023, Trent went on to compile one of the most spectacular counter-narcotics records of any recent Royal Navy vessel: seizing 2,757 kilograms of narcotics worth over £220 million near the US Virgin Islands in March 2024, intercepting smuggling speedboats off Martinique that April, seizing a further 2.5 tonnes of cocaine from a fleeing vessel in May, and taking part in another 500-kilogram, roughly £40 million seizure south of the Dominican Republic that August.

Why an American Policeman Sails on a British Warship

There is a detail behind every one of those seizures that is worth knowing, because without it none of them would stand up. A Royal Navy warship has no power of arrest over a Panamanian-flagged speedboat in international waters, and no British interest in prosecuting a cargo bound for Miami. The United States Coast Guard, uniquely among the American armed services, is a law enforcement agency as well as a military one, and it holds bilateral agreements with most of the states in the region that let it board, detain and prosecute. What it does not have is enough ships. So it puts a Law Enforcement Detachment aboard somebody else's hull, and the division of labour is exact: the Royal Navy supplies the ship, the sea boats, the radar picture and the seamanship, and half a dozen American officers supply the legal authority to put handcuffs on anybody. The whole business is coordinated from Key West by a body called Joint Interagency Task Force South, which is why a seizure by a British patrol ship is usually announced by an American press office.

The individual hauls are striking enough; the total is better. In eight interdictions across seven months, Trent took 9,459 kilograms of narcotics with a street value of just under £749 million. That made her, by the Royal Navy's own reckoning and not anybody else's, the most successful smuggler-hunter it has had this century, passing the frigate HMS Argyll and her £620 million career total. Argyll took a decade over it. Trent took seven months.

Catching a Narco-Submarine

On 26 August 2024, Trent intercepted a home-made narco-submarine carrying cocaine valued at £160 million, a truly remarkable catch given how difficult these semi-submersible smuggling vessels are to detect, and a fitting capstone to an extraordinarily productive Caribbean deployment.

What a Narco-Submarine Actually Is

It is not a submarine, and the people who build them would be the first to say so. The proper name is a low-profile vessel: a hull of fifteen to twenty-five metres, moulded in fibreglass over a wooden or steel frame, with a diesel engine, a long-range fuel tank taking up most of the interior, and a freeboard of perhaps a foot. Painted a dull blue-grey, she runs awash rather than submerged, with a small cockpit and an exhaust snorkel showing above the surface and everything else under it. Three or four men live in the remaining space for a week or more, in temperatures that regularly exceed forty degrees, with fumes, no sanitation and several tonnes of cocaine for company.

They are built in creeks and mangrove swamps along the Pacific coast of Colombia and Ecuador, in yards that can be dismantled and moved, and a good one costs up to two million dollars. That sounds enormous until you notice that a single successful voyage carries several times that in cargo, which is why the vessels are usually treated as disposable. At the peak of the trade something like seventy a year were under construction in Colombia and roughly one in seven of those was ever caught.

The reason they are hard to find is physics rather than cunning. Fibreglass returns almost nothing to a radar set, a hull with a foot of freeboard is inside the sea clutter at any useful range, there is no meaningful wake, and in any sort of swell the whole thing disappears from view at half a mile. Of 214 documented semi-submersible movements, fewer than a quarter were disrupted. Ships do not generally find these things; aircraft and intelligence do, and a United States maritime patrol aircraft found this one for Trent, 190 nautical miles south of the Dominican Republic.

Getting aboard is the other half of the problem. The standard response to being intercepted is to open the sea valves, and a low-profile vessel with several tonnes of cargo goes down in a couple of minutes, taking the evidence with her and leaving a boarding party with four men in the water to rescue and nothing to prosecute. Trent's team, a mixture of American Coast Guard officers, Royal Marines from 47 Commando and her own specialist sailors, got onto the hull and kept it afloat long enough to take off two tonnes of cocaine. It was the first narco-submarine the Royal Navy had ever boarded. Her commanding officer, Commander Tim Langford, described the conditions as challenging, which in the flat register of these things means something closer to appalling. Ninety nautical miles further north the same week, a night-time pursuit by her sea boats took two more suspects and twelve bales.

Hurricane Relief, Twice Over

Beyond her counter-narcotics work, Trent deployed to the Cayman Islands to assist after Hurricane Beryl in July 2024, and to the British Virgin Islands following Tropical Storm Ernesto that August, humanitarian relief work that sits alongside her law enforcement record as a genuine highlight of her Caribbean service.

Still Answering the Call

Trent went on to shadow the Russian destroyer Vice-Admiral Kulakov through the English Channel in August 2025, before returning to the Caribbean in October, providing support after Hurricane Melissa and taking part in the Sail 250 celebration in New Orleans in the summer of 2026, offering guided public tours alongside tall ships from navies around the world, a fitting public-facing moment for a patrol ship whose recent service record has been remarkably extraordinary.

Launching the Fleet's First Heavy-Lift Drone

On 21 August 2026, while patrolling the Caribbean during hurricane season, HMS Trent became the first Royal Navy River-class Batch 2 patrol ship to launch a Malloy T-150B heavy-lift drone, with Scout Flight of 700X Naval Air Squadron running trials to familiarise the crew with operating the uncrewed aircraft from the ship. The quadcopter can carry loads of up to 68kg over ranges of up to 37.5km, intended to help Trent move supplies quickly during a humanitarian or disaster-relief mission.

This is a live article which will be updated when more information is available.
Last checked for updates: 24 October 2026