Chancellor Pledges £6bn for Faslane Floating Dry Docks as UK Shipyards Win Submarine Maintenance Work

Three new floating dry docks required to service Britain's nuclear-powered submarine fleet at Faslane will be constructed by a UK-based shipbuilder, the chancellor has announced, confirming a contract package valued at approximately £6bn.

John Healey told the Labour conference in Liverpool that the facilities were essential to national security and would form part of what he described as a "new age of industrialisation" underpinned by domestic shipbuilding capacity.

The decision on which yard will carry out the work will be settled through a competition open only to UK-based bidders, meaning foreign-owned firms with British operations remain eligible to participate.

Navantia UK, the British arm of the Spanish state-owned shipbuilder, is widely regarded as the leading candidate for the contract. The company has been actively lobbying for the Faslane work and owns the Harland & Wolff shipyard in Belfast alongside fabrication sites at Arnish on the Isle of Lewis, Methil in Fife and Appledore in Devon.

The GMB union has already written to Healey requesting that the contract be distributed across the Methil and Belfast sites, reflecting concerns that the benefits of such a large public investment should be spread across the UK's industrial regions rather than concentrated in a single location.

Other yards in contention include Cammell Laird on Merseyside, which is now owned by Balaena, and Babcock, which operates facilities at Rosyth. Each of these sites would need to demonstrate the technical capacity to deliver structures of the scale and complexity required for submarine maintenance.

Floating dry docks are designed to be partially submerged so that a vessel or submarine can be manoeuvred into position. They are then raised and pumped clear of water, allowing engineers to carry out inspections, maintenance and repairs in a controlled environment.

One significant advantage over fixed land-based alternatives is mobility. Because floating docks can be towed between locations, they offer operational flexibility that static facilities cannot match, potentially allowing the Ministry of Defence to redistribute maintenance capacity around the UK's coastline as strategic requirements change.

The last floating dry dock thought to have been manufactured in the UK is Admiralty Dock 60, built during the 1960s. It remained in service at HMNB Clyde at Faslane until the late 1990s, when it was sold for commercial use, leaving a gap in domestic capability that the new order is intended to fill.

At present, Faslane depends on a single shiplift, an elevator-style mechanism that raises submarines out of the water inside a large maintenance building. The addition of three floating dry docks would substantially increase throughput and reduce the risk of bottlenecks in the maintenance schedule for the Royal Navy's submarine fleet.

The dry dock investment sits within a broader £15bn modernisation programme at the Faslane site, which occupies the eastern shore of Gare Loch, scheduled to be delivered over the coming decade.

In a separate announcement, Healey committed £115m to building a replacement for Cefas Endeavour, the government's principal fisheries and marine science research vessel, within the UK.

The ship is operated by the Centre of Environment, Fisheries and Aquaculture Science and is currently based at Lowestoft in Suffolk. It was launched in 2002 by the Ferguson shipyard in Port Glasgow on the Clyde, which has since been nationalised, and entered service the following year.

The replacement vessel is expected to measure up to 85m (279ft) in length, dimensions that align closely with Ferguson's existing capabilities and could allow the yard to bid for the work. However, it is likely to face competition from commercial yards including Navantia and Cammell Laird.

Cefas Endeavour was regarded as a technically demanding project at the time of its construction. Its specifications imposed exacting standards for noise and vibration so that fish stocks would not be disturbed while survey work was under way, requirements that continue to shape how such vessels are designed and built.

The ship remains in active service more than two decades after entering operation, and its successor is not expected to be delivered until the early 2030s, leaving a long lead time during which planning and procurement will need to be carefully managed.

Healey also used his conference speech to announce that Rolls-Royce will commit an additional £300m to its British factories in Derby, Bristol, Glasgow and Rotherham, extending the industrial dimension of the government's defence and manufacturing agenda.

Taken together, the announcements represent a significant injection of public money into UK shipbuilding and associated engineering supply chains, with implications for employment, skills retention and the country's ability to sustain critical defence infrastructure without relying on overseas contractors.