Why spare space distinguished the Town class

The Royal Navy was choosing among Town-class cruisers, Dido-class cruisers, and Tribal-class destroyers under financial pressure. The Didos packed cruiser weapons into hulls so cramped that their working conditions resembled a destroyer's, limiting endurance and adaptability. Towns were larger because presence, diplomacy, long-range cruising, and war fighting all demanded room for people, stores, repairs, and later alterations. Spare internal volume also reduced the proportion of the ship lost to a single flooded area and gave crews space to move casualties and organize damage control. Although Treasury comparisons made a smaller cruiser look cheaper, the larger Town offered a longer and more flexible service life.