| Grave Lines | 2015 | — | — |
| Gravedale High | 2006 | — | — |
| Great British Heroes | 1976 | — | — |
| Green Lung | 2017 | — | — |
| Grim Reaper | 1979 | — | — |
| Grinn | 2024 | — | — |
| Grooving in Green | 2008 | — | — |
| Groundbreaker | 2018 | — | Melodic hard rock band |
| Grumbling Fur | 2011 | — | — |
| Guana Batz | 1983 | — | — |
| Guapo | 1994 | — | — |
| Gudjohr | 9 June 2012 | — | — |
| Guillemots | November 2004 | — | — |
| Guitar Gangsters | 1988 | — | — |
| Guiye Frayo | 2007 | — | — |
| Gum Takes Tooth | 2009 | — | — |
| Gunslinger | 1979 | — | — |
| Gypsy Pistoleros | 2005 | — | — |
| Gyro | 1975 | — | — |
| Gévaudan | 6 June 2013 | — | — |
| Hackney Colliery Band | January 2008 | — | — |
| Hacktivist | 2011 | — | — |
| Haggard Cat | 2011 | — | — |
| Haken | 2007 | — | — |
| Half Man Half Biscuit | 1984 | — | — |
| Hamerex | 14 August 2004 | — | — |
| Hamfatter | 2001 | — | — |
| Hands Off Gretel | February 2015 | — | — |
| Hanging Doll | 2002 | — | — |
| Hapshash and the Coloured Coat | 1967 | — | — |
| Harbinger | July 2015 | — | — |
| Hard‐Fi | 2002 | — | — |
| Hats Off Gentlemen It’s Adequate | 2009 | — | — |
| Haunted Stereo | October 2007 | — | — |
| Hawk Eyes | 2004 | — | — |
| Hawklords | 2008 | — | — |
| Hawkwind | October 1969 | — | — |
| Haze | 1978 | — | — |
| Head Cloud | 2022 | — | — |
| Headshot Stereo | 23 March 2013 | — | — |
| Headspace | 2006 | — | — |
| Heaven 17 | 1980 | — | Sheffield, UK “new romantic” band |
| Heavy Lungs | 1 March 2017 | — | — |
| Heavy Metal Kids | 1972 | — | — |
| Heavy Pettin’ | 1981 | — | — |
| Heavy Sentence | 2017 | — | — |
| Heavyball | 12 October 2011 | — | — |
| Hecate Enthroned | 1993 | — | — |
| Helen Love | 1992 | — | — |
| Helgrind | 2000 | — | — |
| Hell | 1982 | — | — |
| Hellripper | 2014 | — | — |
| Help Yourself | 1970 | — | — |
| HERIOT | 2014 | — | — |
| Herne | 2008 | — | — |
| Heron | 1968 | — | — |
| Hjearts | August 2012 | — | — |
| Hoatzin | 1 January 2013 | — | — |
| Holding Absence | 1 August 2016 | — | — |
| Holiday Ghosts | 2016 | — | — |
| Holocaust | 1977 | — | UK heavy/progressive metal band |
| Holosade | 1985 | — | — |
| Homebrew | December 1995 | — | — |
| Hood | December 1990 | — | — |
| Horace Goes Skiing | 1991 | — | — |
| Horowitz | 2003 | — | — |
| Horrified | 2012 | — | — |
| Hostile Tides | 6 March 2024 | — | — |
| Hot Chip | 2000 | — | — |
| Hot Chocolate | 1969 | — | 70s and 80s British soul band |
| Hot Fiction | 1 June 2008 | — | — |
| Hot Knife Club | 2015 | — | — |
| Hot Milk | 2018 | — | — |
| Hot Natured | 2009 | — | — |
| Hryre | 2013 | — | — |
| Hudson–Ford | 1973 | — | — |
| Hundred Year Old Man | 2015 | — | — |
| Hungry Brains | 1 March 2012 | — | — |
| Hurdles | 1 October 2012 | — | — |
| Hurts | 2009 | — | electro‐pop duo from Manchester, UK |
| Hybrid Constellation | 1 May 2010 | — | — |
| Hydra Vein | 1987 | — | — |
| Hypnologica | 2013 | — | — |
| I Am Jack | 2000 | — | — |
| I Am Kloot | 1999 | — | English rock band |
| I Like Trains | 2003 | — | — |
| I, Ludicrous | 4 February 1985 | — | — |
| Ian Dury & the Kilburns | 1972 | — | — |
| IDER | 2015 | — | — |
| IDLES | 2009 | — | — |
| Idlewild | December 1995 | — | Scottish indie rock band |
| Ihlo | June 2016 | — | — |
| ILL | 6 April 2012 | — | — |
| Ill Gotten Gains | 2013 | — | — |
| Imagination | 1981 | — | English soul/funk band |
| Imindain | 2002 | — | — |
| Imperium | 2010 | — | — |
| In Cahoots | 1982 | — | — |
| In Crooked Wonderment | 20 April 2024 | — | — |
| Incognito | 1979 | — | UK acid jazz band |