HMS Laleston (M1158): From Minesweeping to Underwater Trials

HMS Laleston (M1158)

Built at Harland and Wolff

HMS Laleston was laid down on 12 March 1953 by Harland and Wolff in Belfast and completed on 10 November 1954 after a construction period of some twenty months, entering service in January 1955 attached to the Vernon Training Squadron alongside the crew of her sister ship HMS Bildeston, a fairly typical start for a Ton-class minesweeper in the busy postwar years when the Royal Navy was still working out exactly how best to deploy its very large fleet of these versatile little ships.

Refits and a New Set of Engines

HMS Laleston underwent extensive refit work through 1956, passing through the hands of four different commanding officers in fairly short order, before entering a prolonged conversion between 1960 and 1963 that saw her fitted with more powerful Deltic diesel engines, a significant upgrade that considerably extended her useful service life. She recommissioned as Senior Officer's ship of the 3rd Minesweeping Squadron based at Portland, a position of some seniority within her flotilla.

A Second Career in Diving Trials

HMS Laleston was converted to serve as a diving trials ship in 1966, a role she went on to fill for over a decade, conducting operations across northern European waters and the Mediterranean in support of the Royal Navy's diving and underwater research programmes, a genuinely specialist and rather less glamorous role than conventional minesweeping but one that made good use of a hull and crew already well versed in careful, methodical work below the waterline. Along the way she found time for rather more ceremonial duties too, escorting the yachtsman Sir Alec Rose during his celebrated solo circumnavigation and taking part in the Spithead Review of 1977, marking the Queen's Silver Jubilee.

A Long Career Comes to an End

HMS Laleston finished out her service between 1978 and 1982 with the 10th Mine Countermeasures Squadron and the Northwest Sea Training Group, before finally paying off in February 1982 after 22 years of active naval service. She was sold to G and T Services of Barking for breaking up on 26 February 1985, closing out the career of a minesweeper whose working life had taken her a very long way from her original purpose, from sweeping mines in home waters to conducting sensitive diving trials across two seas.