HMS Iveston (M1151): The Ship of the Royal Navy's Last Mutiny

HMS Iveston (M1151)

Built at Dartmouth

HMS Iveston was ordered on 19 March 1952 and built by Philip and Son at Dartmouth, laid down that October, launched on 1 June 1954 and completed on 29 June 1955, a Ton-class minesweeper measuring 152 feet overall and displacing 360 long tons normal, rising to 425 tons at deep load. She was originally powered by two Mirrlees diesel engines producing 2,500 shaft horsepower for a top speed of 15 knots.

A Significant Upgrade

HMS Iveston spent 1956 to 1962 in operational reserve before undergoing significant conversion and recommissioning on 16 October 1964, joining mine countermeasures operations at Port Edgar. Her original magnetic sweep gear was replaced with Type 193 sonar detection equipment, and her engines were upgraded to Napier Deltic diesels rated at a considerably more powerful 3,000 brake horsepower, transforming her into a genuinely modern minehunter well suited to Cold War operational demands.

The Royal Navy's Last Mutiny

HMS Iveston earned herself a genuinely unusual and rather unwelcome place in naval history on 5 July 1970, at Ullapool, when what has since been recorded as the most recent mutiny in the Royal Navy took place aboard her. Five crew members were subsequently court-martialled and dismissed from the service as a result, a genuinely rare event for a modern Royal Navy vessel and one that stands out sharply against the otherwise steady, unremarkable record of a working minesweeper going about her routine business.

A Long Second Career

HMS Iveston was decommissioned in 1992 and converted for training duties, becoming TS Iveston on her arrival at Tilbury on 28 August 1993, where she went on to serve the Sea Cadet Corps for more than two decades, giving generations of young cadets their first hands-on experience of a real naval vessel. Rising maintenance costs and safety concerns eventually caught up with her, and she was sold to ship breakers at Erith in March 2015, closing out the career of a minesweeper whose greatest claim to lasting historical notoriety came not from any action against an enemy, but from a single, genuinely rare breakdown in discipline at a Scottish port in the summer of 1970.