Engineers have been authorised to remove the three masts from the SS Richard Montgomery, one of Britain's most hazardous World War II shipwrecks, which still contains over 1,400 tonnes of explosives. The wreck lies in the Thames Estuary, approximately 1.5 miles off the Kent coast and just over a mile from the town of Sheerness. The masts, which have been visible above the waterline for decades, are to be cut down to below sea level to ease structural pressure on the wreck and reduce the risk of heavy objects falling onto the munitions below.
Timeline and Preservation Plans
The removal operation is scheduled to begin in September 2026. After extraction, the masts will be transported to Chatham’s Historic Dockyard in Kent for preservation and eventual public display. Maritime minister Keir Mather stated near the wreck site: “They’ve been part of the maritime history of places like Sheerness for decades. And we want to make sure that that continues to happen for decades to come.” Following preservation, teams will decide on the optimal location for the masts to ensure accessibility for local communities.
Technical Approach to Mast Removal
Robin Rickard, providing strategic explosive ordnance advice to the Department for Transport (DfT), explained that the work will require a jackup barge—a floating platform with long legs “firmly anchored into the seabed, so it won’t move.” He elaborated: “We’re going to put a jackup barge alongside it, both the stern section and the forward section, and then we’re going to use a diamond wire saw to chop the masts and recover them.” The operation is designed to minimise any disturbance to the explosive cargo.
Historical Context and Safety Assessment
The SS Richard Montgomery, known as ‘Monty’, was transporting “safe-to-transport munitions” from the USA to Great Britain when it sank in 1944. Rickard noted that the munitions were “not armed or fused during transport,” which explains why they have remained stable for 82 years in wet storage. He added: “The reason we’re doing something about it now is that the masts are in a window where they’re likely to fail and the Department for Transport is taking every step reasonable to reduce the hazard of a falling mast onto an explosive cargo.”
International Cooperation and Local Impact
Paul Barnard, deputy chief executive at Chatham Historic Dockyard Trust, emphasised the masts’ significance: “It serves today really as a permanent reminder of the Second World War, the role that not just the Navy allied forces played but also those support-class vessels.” To retain the masts in the UK, DfT officials coordinated with their US counterparts. US ambassador to the UK Warren Stephens wrote to Kevin McKenna, Labour MP for Sittingbourne and Sheppey, supporting the display efforts. Stephens stated: “I am pleased to share that our Department of Transportation welcomes efforts to honour the memory and keep the masts in the UK for public display where they may continue to be appreciated by your constituents.” Mather commented: “It shows the depths of the partnership between our two nations, both in the Second World War to the present day.”
Ongoing Safety Measures
An exclusion zone will remain around the vessel for as long as necessary, but Mather assured that “the wreck itself is stable.” Nolan Conway, project manager at Resolve Marine, the contractor for the mast height reduction, said: “Drawing on our extensive experience in complex marine operations, we are committed to executing this work safely, efficiently and in close collaboration with all stakeholders. This historic project represents a significant milestone in the ongoing management of one of the United Kingdom’s most closely monitored wreck sites.”
