The Admiralty was always conscious of the need for numbers of cruisers not just large cruisers. To this end instead of 13 County class, 3 are cancelled and replaced with six 5,000 ton light cruisers.
The 'G' class cruisers were based on the 1916 design of the Modified extended 'D' class long range cruisers. The basic design was swept clean of superstructure and the latest models were designed into the new ships. The ships were wider than the original D class. The Royal Navy had been introduced to the 5.5" gun with the two Greek cruisers taken over by the RN and commissioned as the Chester and Birkenhead. This had proved to be a very handy weapon and was fitted to many ships of all sorts of different classes. (This allows me to have an extra gun size in the armouries). Four twin light splinter proof turrets were fitted with these weapons. 4" AA guns provided the heavy AA while two 4 barrel 2 pounder pom poms were fitted as the light AA armament. Two banks of triple 21" torpedoes, a catapult and handling facilities for one aircraft.
The original design showed the '0' degree bow while the production models had the trawler bows and were slightly longer because of it.