HMS Mauritius (80): From D-Day's Sword Beach to a Night Battle Off Brittany

Named for a Colony, Built on the Tyne

HMS Mauritius was built by Swan Hunter at Newcastle upon Tyne, a Fiji-class light cruiser entering service in 1941 and named after Mauritius, which was at the time a British colony, in keeping with the class's tradition of naming ships for territories across the Empire. She was laid down on 4 April 1938 and launched on 19 July 1939, entering the water with the war she would spend most of her career fighting still a few weeks off.

The class she belonged to is worth a moment, because it exists entirely because of a number in a treaty. The second London naval conference of 1936 cut the ceiling for a light cruiser from the 10,000 tons allowed at Washington down to 8,000, and the Admiralty, which had just built the Town class and rather liked them, was left with the problem of putting a Town's fighting power into a hull a thousand tons lighter.

The answer was the Fiji class, or the Crown Colony class, depending on which book you read. Same twelve 6-inch guns, in a hull made shorter and narrower and finished with a flat transom stern instead of a cruiser stern, which gained efficiency through the water and useful volume inside at the same time. The quickest way to tell one from a Town at a distance is the funnels: upright, rather than raked. Eleven were built, the first eight of them the Fiji group and the last three, slightly modified, the Ceylons. Two were dead within a year of each other, Fiji herself off Crete in May 1941 and Trinidad in the Arctic in May 1942.

Her early career was not an auspicious one: an internal degaussing system, fitted to help protect her against magnetic mines, caused severe corrosion to her copper fire main, a problem serious enough to require successive refits at Simonstown, Singapore and Plymouth before she could be considered properly operational, a truly frustrating start for a brand new warship.

It was worse than frustrating. A fire main is the ring of pressurised salt water that feeds every hose, every spray system and every damage-control point in the ship; a warship with a corroded fire main is a warship that cannot reliably put out fires, which for a thin-skinned cruiser is close to the whole of her survivability. And the cause of it was the cure for something else. Degaussing coils were being fitted across the fleet in a hurry after the magnetic mine crisis of the winter of 1939, described in the article on HMS Mastiff (T10), and on Mauritius the system meant to save her from one kind of death quietly ate the plumbing that protected her from another.

Putting it right took three dockyards on three continents, Simonstown, Singapore and Plymouth, and the better part of her first two years. That is why an ostensibly 1941 cruiser does not really start her war until the spring of 1943.

From Sicily to Anzio

HMS Mauritius joined the Eastern Fleet in 1942 before transferring to the Mediterranean in April 1943, where her career finally began in earnest. She took part in Operation Husky, the invasion of Sicily, in July 1943, providing shore bombardment in support of the landings, and went on to cover the Salerno landings that September.

Late in 1943 she was assigned to anti-blockade-runner patrols in the Bay of Biscay, before returning to the Mediterranean to support Operation Shingle, the landings at Anzio, in January 1944, a notably demanding schedule of amphibious support work that took her from one contested beachhead to the next.

Covering Sword Beach

HMS Mauritius took part in the Normandy landings in June 1944 as flagship of Bombardment Force D, carrying Rear Admiral Wilfrid Patterson and providing naval gunfire support off Sword Beach alongside the cruisers HMS Arethusa, HMS Danae and HMS Frobisher, a central role in what remains the largest amphibious invasion in history and a fitting culmination to a career that had already included three earlier landing operations in the Mediterranean.

Her work off the beaches was far from a single day's business. On 8 June she opened fire again alongside the battleships HMS Ramillies and HMS Rodney, dropping broadsides onto German tanks, vehicles and infantry massing in nearby woodland, and she was still at it more than six weeks later, supporting the advance of Commonwealth land forces around Caen on 18 July during Operation Goodwood.

A Night Battle in the Bay of Audierne

HMS Mauritius moved on to patrol the Brittany coast that August as part of Force 27, a three-ship team under Captain W. W. Davis made up of Mauritius herself and the destroyers HMS Ursa and the Canadian HMCS Iroquois. On the night of 22 and 23 August 1944 the trio, patrolling on a tip from naval intelligence, picked up a large radar contact and closed in for what became the Battle of Audierne Bay, a sharp night action in which they sank eight German vessels between them, including the auxiliary Sperrbrecher 157, with Mauritius's own gunfire alone accounting for five Vorpostenboote patrol vessels, an effective piece of work clearing out German coastal shipping as Allied forces pushed inland through France.

Damaging a German Destroyer

HMS Mauritius fought in the Action of 28 January 1945, one of the last surface engagements the Kriegsmarine ever fought, when she and HMS Diadem intercepted three German destroyers, Z31, Z34 and Z38, slipping south from Norway to the Baltic off the Norwegian coast. Z31 took seven hits, her forward turret wrecked and 55 of her crew killed with a further 24 wounded, and Z34 was also damaged, though the German ships ultimately outran their slower British pursuers and escaped, a further reminder that, even this late in the war, the Royal Navy's surface ships were still finding real fighting work to do in home waters. She underwent a lengthy refit at Cammell Laird from February 1945 through to March 1946, missing the war's final months but emerging modernised for peacetime service.

The Corfu Channel and the East Indies

HMS Mauritius served in the Mediterranean after the war, and on 22 October 1946 led the flotilla, cruiser HMS Leander and a pair of destroyers included, sent north through the Corfu Channel to test Albania's tolerance of the Royal Navy's right of innocent passage. Mauritius herself passed through unharmed, but the destroyer following close behind her, HMS Saumarez, struck a mine and was severely damaged, as was HMS Volage, a tense episode that cost dozens of British lives before HMS Mauritius returned to the United Kingdom in 1948.

That passage was not an idle piece of flag-showing. The previous May, Albanian shore batteries had opened fire on HMS Orion and HMS Superb (25) in the same stretch of water, and October's squadron was sent through precisely to establish whether Britain could use an international strait or not. It could, as it turned out, at the cost of two destroyers and forty-four lives.

What followed was arguably more consequential than the mines. Britain took Albania to the International Court of Justice, and the resulting judgment is case number one on that court's list, the first it ever heard; the full story of it, and of the Albanian gold that sat in London for another half-century, is in the article on HMS Cardigan Bay. Mauritius, the ship that led the column and got through untouched, is a footnote in a case that helped define the law of the sea.

She recommissioned in 1949 to join the Mediterranean cruiser squadron and served on the East Indies Station between 1949 and 1951, before finally returning to Chatham in December that year.

Scrapped at Inverkeithing

HMS Mauritius was placed in reserve in 1952 and remained there for over a decade before being sold for scrapping to Thos. W. Ward in 1965, arriving at the Inverkeithing yard on 27 March that year, closing out the career of a cruiser whose troubled start had given way to a particularly distinguished record supporting some of the most consequential Allied landings of the entire Second World War.