There was in effect a projected 16-18,000 tonnes standard design in 1939 calling for three triple turrets with 8-in guns like American cruisers, but it never materialized. "British Town Class Cruisers is a fine addition to the historiography of both Royal Navy cruiser design of the early to mid-twentieth century and the service histories of each vessel. The project had triple turrets able to withstand the impact of 152-millimeter projectiles at normal combat distances, as well as a catapult and hangar for two aircraft. Five Southampton class cruisers were built by Great Britain (HMS Southampton , HMS Newcastle , HMS Sheffield , HMS Glasgow and HMS Birmingham ), entering service just prior to the start of the Second World War. "British Town Class Cruisers is a fine addition to the historiography of both Royal Navy cruiser design of the early to mid-twentieth century and the service histories of each vessel. The Town class was a group of twenty - one light cruisers built for the Royal Navy RN and Royal Australian Navy RAN These vessels were long - range cruisers corvette until the last cruiser was decommissioned more than a century later. The Town class was a 10-ship class of light cruisers of the Royal Navy.The Towns were designed to the constraints imposed by the London Naval Treaty of 1930; the ships were built in three distinct sub-classes, the Southampton and Edinburgh classes each sub-class adding on further weaponry. When the admiralty went back to 10,000 tons cruisers of the “Town” class from 1936, the fad then was to display more guns of smaller caliber (6 inches) instead. Here is the detail of all ships from five sub-classes. Southampton class ships are the original variants of the Town class cruisers. The Southampton class cruiser is a light cruiser. The ten ships that formed the Town Class of light cruisers were the epitome of Royal Navy all gun cruiser development. The Town class was a group of twenty-one light cruisers built for the Royal Navy (RN) and Royal Australian Navy (RAN). As built, the Towns had raked funnels and masts which, together with the bulky aircraft hangars between the fore-funnel and bridge structure, gave them a very different appearance. The six light cruisers of the Chatham Class were completed between 1912 and 1916.. The Town class was intended to counter potentially hostile foreign cruiser designs such as the Japanese Mogami class, hence the need for the heavier main armament. Armed with twelve 6-inch guns mounted in four turrets, they participated in every European Theater naval campaign of World War II and two of the class also saw action during the Korean War. The cruisers of the Town class, launched between 1936 and 1938, were the British equivalent to the Japanese cruisers of the Mogami class. Before the more famous 1936 Town class, there was already one of 21 "Town" class cruisers that actively participated in the Great war, some (like the Autralian ones), seeing the second world war as well. They were sometimes treated as the second sub-type of an encompassing "Town Class" which included the five earlier Bristol and four Weymouth class and the following four Birmingham and two Birkenhead class cruisers. The Town class cruisers saw action throughout the entirety of the Second World War, perhaps more than any other class of cruiser. They helped hunt the German battleship Bismarck, escorted vital convoys through the Mediterranean, and fought the Japanese in the Pacific.