Royal Navy Warship Strength
The Royal Navy, still the largest in the world in September 1939, included:
15 Battleships & battlecruisers, of which only two were post-World War I. Five ‘King George V’ class battleships were building.
7 Aircraft carriers. One was new and five of the planned six fleet carriers were under construction. There were no escort carriers.
66 Cruisers, mainly post-World War I with some older ships converted for AA duties. Including cruiser-minelayers, 23 new ones had been laid down.
184 Destroyers of all types. Over half were modern, with 15 of the old ‘V’ and ‘W’ classes modified as escorts. Under construction or on order were 32 fleet destroyers and 20 escort types of the ‘Hunt’ class.
60 Submarines, mainly modern with nine building.
45 escort and patrol vessels with nine building, and the first 56 ‘Flower’ class corvettes on order to add to the converted ‘V’ and ‘W’s’ and ‘Hunts’. However, there were few fast, long-endurance convoy escorts.
Amazing when you consider the UK had no domestic supply of oil.