The G and H class was a class of twenty-four destroyers of the Royal Navy (two later transferred to the Royal Canadian Navy and one to the Polish Navy) launched in 1935–1939. They served in World War II and seventeen were lost.

General characteristics

• Displacement: 1,340 tons
• Length: 323 ft (98 m)
• Complement: 145 men
• Armament: four 4.7 inch (120 mm) guns, two 0.5 inch (10 mm) AA, eight 21 inch (500 mm) torpedo tubes
• Speed: 36 knots (70 km/h)
• Propulsion: Geared turbines, 2 shafts, 34,000 hp (30 MW)

G class

• Gallant, launched on 26 September 1935, destroyed by air attack at Malta on 5 April 1942
• Garland, launched on 24 October 1935, to Poland as ORP Garland
• Gipsy, launched on 7 November 1935, sunk by a mine near Harwich on 21 November 1939
• Glowworm, launched on 22 July 1935, sunk while ramming the German cruiser Admiral Hipper on 8 April 1940
• Grafton, launched on 18 September 1935, Sunk by U-62 on 29 May 1940
• Grenade, launched on 12 November 1935, sunk by air attack at Dunkirk on 29 May 1940
• Grenville, launched on 15 August 1935, sunk by a mine on 19 January 1940
• Greyhound, launched on 15 August 1935, sunk by German dive-bombers in the battle of Crete on 22 May 1941
• Griffin, launched on 15 August 1935, to Canada as HMCS Otter

H class

• Hardy , launched on 7 April 1936, sunk by gunfire from German destroyer Georg Thiele on 10 April 1940 in the battle of Narvik
• Hasty, launched on 5 May 1936, torpedoed by the German motor torpedo boat S-55 on 14 June 1942, sunk near Derna by Hotspur on 15 June 1942
• Havock, launched on 7 July 1936, grounded near Kelibia , Tunisia and scuttled on 6 April 1942
• Hereward, launched on 10 March 1936, sunk by German Ju 87 dive-bombers near Plaka, Crete on 29 May 1941
• Hero, launched on 10 March 1936, to Canada as HMCS Chaudiere
• Hostile, launched on 24 January 1936, damaged by a mine on 23 August 1940 and sunk by Hero
• Hotspur, launched on 23 March 1936
• Hunter, launched on 25 February 1936, sunk by German destroyers on 10 April 1940 in the battle of Narvik
• Hyperion, launched on 8 April 1936, sunk by a mine near Pantelleria on 22 December 1940

Havant class

These six ships were ordered by the Brazilian Navy but on the outbreak of World War II they were requisitioned by the Royal Navy. They are usually included with the H class.

• Harvester , formerly Hardy, launched on 29 September 1939, sunk by U-432 on 11 March 1943
• Havant , launched on 17 July 1939, damaged by air attack off Dunkirk on 1 June 1940 and sunk by Saltash
• Havelock , launched on 16 October 1939
• Hesperus, formerly Hearty, launched on 1 August 1939
• Highlander , launched on 19 October 1939
• Hurricane, launched on 29 September 1939, sunk by U-415 on 24 December 1943