Babcock: First major cut completed on UK’s decommissioned submarine at Rosyth

Defense company Babcock has completed a significant step in the UK’s pioneering effort to dismantle and recycle a decommissioned nuclear-powered submarine.

At its Rosyth facility in Scotland, the company removed the fin from the former Royal Navy submarine Swiftsure, marking the first major cut on the vessel’s exterior and a crucial milestone in the demonstrator program.

The dismantling project, led by Babcock in collaboration with the Defence Nuclear Enterprise, contractor KDC Veolia Decommissioning Services UK and Rolls-Royce, is part of a wider initiative to establish a long-term, sustainable method for processing the UK’s retired nuclear submarines.

Swiftsure, the first submarine selected for full dismantling, is on track to be completely deconstructed by the end of 2026.

The process employs a world-first methodology for nuclear submarine disposal, combining advanced engineering with rigorous safety and environmental standards, according to Babcock.

The firm estimates that approximately 90% of Swiftsure’s total weight will be recycled. Notably, high-quality steel from the vessel is expected to be repurposed for use in future Royal Navy submarines, contributing to a circular approach to defence resource management.

“Reaching this significant milestone sets a strong foundation for an enduring commitment that supports both national security and environmental responsibility and is testament to the dedication and expertise of our teams, as we look to provide a safe and secure solution to the dismantling of the UK’s decommissioned nuclear submarines,” Harry Holt, Chief Executive of our Nuclear Sector, said.

“To see the fin of Swiftsure removed is a significant marker of progress in the Defence Nuclear Enterprise’s Submarine Dismantling Project. Our colleagues continue to work tirelessly alongside our industry partners in Rosyth to deliver a proven dismantling method using this demonstrator vessel. My thanks go to everyone involved in this ground-breaking work,” Chris Gardner KBE, CEO of the Submarine Delivery Agency, commented.

“The Project showcases our commitment to sustainable disposal practices. By recycling materials wherever possible, we’re ensuring these vessels that served the nation so well continue to provide value even after decommissioning,” Lorraine Russell, Senior Responsible Owner for the Submarine Disposals Program, added.

As part of Babcock’s ongoing support for the UK’s submarine fleet, this project demonstrates the feasibility of a scalable and responsible submarine disposal program.