| The Indelicates | 2005 | — | — |
| The Infernal Sea | 2010 | — | — |
| The Insane | 1979 | — | — |
| The Instigators | 1980 | — | — |
| The Introze | 1979 | — | — |
| The Jaded Hearts Club | 17 March 2018 | — | — |
| The Janskys | 2007 | — | — |
| The JB Conspiracy | 1999 | — | — |
| The Jesus and Mary Chain | 1984 | — | — |
| The Julia Set | 1 September 2006 | — | — |
| The Kills | 2000 | — | — |
| The Kooks | 2004 | — | UK band |
| The Korgis | 1979 | — | — |
| The K’s | 2016 | — | — |
| The Last Battle | 2009 | — | — |
| The Last Dinosaur | 2006 | — | — |
| The Last Shadow Puppets | 2007 | — | — |
| The Law | 1991 | — | — |
| The Law | 2006 | — | — |
| The Left Outsides | 2003 | — | — |
| The Legendary Pink Dots | August 1980 | — | — |
| The Libertines | 1997 | — | British indie rock band |
| The Lightning Seeds | 1989 | — | — |
| The Lost Junktion | 15 June 2011 | — | — |
| The Lotus Eaters | 1982 | — | — |
| The Lovely Eggs | 2006 | — | — |
| The Lurkers | 1976 | — | — |
| The Magic Numbers | 2002 | — | — |
| The March Violets | 1981 | — | — |
| The Marionettes | 1986 | — | — |
| The Meadows | 1 January 2010 | — | — |
| The Meads of Asphodel | 1998 | — | — |
| The Mekons | 1976 | — | — |
| The Members | 1977 | — | — |
| The Memoirs | 2018 | — | — |
| The Memory Band | 2003 | — | — |
| The Men That Will Not Be Blamed for Nothing | 2008 | — | — |
| The Men They Couldn’t Hang | 1984 | — | — |
| The Mighty Boosh | 1998 | — | — |
| The Milk & Honey Band | 1994 | — | — |
| The Mission | December 1985 | — | gothic rock band |
| The Monochrome Set | 1978 | — | — |
| The Movies | 1974 | — | — |
| The Mummers | 16 June 2006 | — | — |
| The Mysterines | 1 March 2017 | — | — |
| The Nashville Teens | 1962 | — | — |
| The Nightingales | 1979 | — | — |
| The Nosebleeds | 1976 | — | — |
| The Now | 1976 | — | — |
| The Obnoxious UK | 2001 | — | — |
| The One Hundred | 3 May 2008 | — | — |
| The Oppressed | 1981 | — | — |
| The Orchestra (For Now) | March 2023 | — | — |
| The Orchids | 1986 | — | — |
| The Ordinary Boys | 2004 | — | — |
| The Orielles | 1 January 2013 | — | — |
| The Oscillation | 2006 | — | UK drone ambient rock |
| The Others | 2002 | — | — |
| The Outcasts | June 1977 | — | — |
| The Owl Service | 2006 | — | — |
| The Palookas | 1985 | — | — |
| The Partisans | 1979 | — | — |
| The Pastels | 1982 | — | — |
| The Penguin Party | 14 February 2009 | — | — |
| The Phantom Light | October 2009 | — | — |
| The Pigeon Detectives | 2002 | — | — |
| The Pineapple Thief | 1999 | — | English progressive rock band |
| The Pirate Ship Quintet | 1 May 2006 | — | — |
| The Plague | 1976 | — | — |
| The Planet Wilson | 1985 | — | — |
| The Plugs | 2000 | — | — |
| The Popguns | 1986 | — | — |
| The Pre New | 1 April 2010 | — | — |
| The Pretty Things | 1963 | — | English rock band |
| The Primitives | July 1985 | — | — |
| The Primitives | 1964 | — | — |
| The Prodigy | 5 October 1990 | — | UK electronic group, main member Liam Howlett |
| The Psychedelic Furs | February 1977 | — | — |
| The Qemists | 2004 | — | — |
| The Quails | 2006 | — | — |
| The Quarrymen | 1956 | — | — |
| The Quireboys | 1984 | — | — |
| The Ragamuffins | 2008 | — | — |
| The RAH Band | 1977 | — | — |
| The Raincoats | 1977 | — | — |
| The Raven Age | 2012 | — | — |
| The Real People | 1988 | — | — |
| The Real Thing | 1970 | — | British soul group formed in the 1970s |
| The Real Tuesday Weld | 2000 | — | — |
| The Record Players | 1977 | — | — |
| The Reelers | 1 May 2011 | — | — |
| The Repeat Offenders | 1 June 2013 | — | — |
| The Revolving Paint Dream | 1983 | — | — |
| The Reytons | 1 January 2017 | — | — |
| The Rezillos | 1976 | — | — |
| The Rifles | 2004 | — | — |
| The Rock Orchestra | 2020 | — | — |
| The Rockin’ Berries | 1961 | — | — |
| The Rolling Stones | 1962 | — | — |
| The Rubettes | 1973 | — | — |