List courtesy of 
Retronic, with revisions and additions by me.

London-based British label under Themes International Music Limited, founded January 10th, 1973 by Alan Parker. Now under EMI.
Initially based at 165-171 High Road, Willesden, moved a few years later to 174 Wardour Street (just down the street from De Wolfe), and eventually settled at 21 Denmark Street, an address it shared with KPM.
For later releases on CD, please see 
this thread.
Themes, 
LPs:
TIM No. 1001 - The Lighter Touch (1973)
TIM No. 1002 - New Blood (1973)
TIM No. 1003 - Main Themes and Sig Tunes (1973)
TIM No. 1004 - The Guitar Family-Volume 1 - played and composed by Alan Parker (1973)
TIM No. 1005 - The Guitar Family-Volume 2 - played and composed by Alan Parker (1973)
TIM No. 1006 - The Romantic Mood
TIM No. 1007 - Light Activity
TIM No. 1008 - Dramatic Action (1973)
TIM No. 1009 - Happy Pastimes (1973)
TIM No. 1010 - Jingles
TIM No. 1011 - The Rock Machine
TIM No. 1012 - Synthesizer and Percussion (1974)
TIM No. 1013 - Breath of Danger (1974)
TIM No. 1014 - Freedom Road
TIM No. 1015 - Mystery Movie (1974)
TIM No. 1016 - Orchestral Theme Suites (1974)
TIM No. 1017 - Rock Comedy (1976)
TIM No. 1018 - The All American Powerhouse (1976)
TIM No. 1019 - Je t'aime (1976)
TIM No. 1020 - Pan-American Travelogue (1976)
TIM No. 1021 - The Voice of Soul
TIM No. 1022 - The Sound of Soul
TIM No. 1023 - Pulse of Events (1976)
TIM No. 1024 - Drama Suite Part I (1976)
TIM No. 1025 - Drama Suite Part II (1976)
TIM 1026 - Things to Come (1977)
TIM 1027 - Contemporary Contrasts
TIM 1028 - Guitar Pictures
TIM 1029 - Percussion Spectrum (
undated)
TIM No. 1030 - Listen to LA (
undated)
TIM 1031 - Have Sounds Will Travel
TIM 1032 - Street Pictures (1979)
TIM 1033 - Keytronics
TIM 1034 - Wish You Were Here
TIM 1035 - Jingles 2 (1981)
TIM 1036 - Jingles 3
TIM 1037 - Street Level
TIM 1038 - Airwaves - Gordon Giltrap Band
TIM 1039 - New Angles (1982)
TIM 1040 - Night Sensations
TIM 1041 - The Sax Album (1982)
TIM 1042 - Modern Music (1983)
TIM 1043 - Classic Manoeuvres (1983)
TIM 1044 - Coast to Coast (1983)
TIM 1045 - Spectrum (1984)
TIM 1046 - Chartbeat (1984)
TIM 1047 - Now Playing
TIM 1048 - Making the Grade (1984)
 Themes Library of Contemporary Music
Themes Library of Contemporary Music, 
LPs:
TIM 1049 - A New Age (1986)
TIM 1050 - Chameleon - Bill Nelson (1986)
TIM 1051 - Hype It (1986)
TIM 1052 - New Design (1987)
TIM 1053 - What's New (1987)
TIM 1054 - On the Wharf (1987)
Composers:
TIM No. 1001 - James Clarke
TIM No. 1002 - Alan Parker/Alan Hawkshaw/Jon Watts (Alan Hawkshaw/Alan Parker/Barry Morgan/Jim Lawless/Les Hurdle)/Mike Cox (Alan Hawkshaw/Alan Parker/Barry Morgan/Jim Lawless/Brian Odgers)
TIM No. 1003 - Alan Tew/David Lindup/Johnny Pearson
TIM No. 1004 - Alan Parker
TIM No. 1005 - Alan Parker
TIM No. 1006 - Alan Hawkshaw/Alan Parker/Alan Tew/Martin Slavin/Johnny Pearson/Jim Lawless
TIM No. 1007 - Johnny Pearson/Jim Lawless/David Lindup/Martin Slavin
TIM No. 1008 - David Lindup/Johnny Pearson/Jim Lawless
TIM No. 1009 - Alan Parker/Johnny Pearson/Jim Lawless/David Lindup/Martin Slavin/Alan Tew
TIM No. 1010 - Alan Hawkshaw/Alan Parker/Barry Morgan/Jim Lawless/James Clarke/Bob Efford
TIM No. 1011 - Alan Hawkshaw/Alan Parker
TIM No. 1012 - Alan Hawkshaw/Brian Bennett
TIM No. 1013 - David Lindup/Brian Bennett/Alan Hawkshaw/Alan Parker/Kenny Salmon/Barry Morgan/Ray Cooper
TIM No. 1014 - Alan Hawkshaw/Alan Parker/Kenny Salmon/David Lindup/Brian Bennett
TIM No. 1015 - James Clarke
TIM No. 1016 - Johnny Pearson/Ian Page
TIM No. 1017 - Mike Moran/Alan Tew/Alan Parker/The Rhythm Section (Alan Hawkshaw/Alan Parker/Barry Morgan/Les Hurdle/Frank Ricotti/Mike Moran)/Alan Hawkshaw/Frank Ricotti
TIM No. 1018 - Alan Parker/Alan Hawkshaw/Alan Tew/Mike Moran/Les Hurdle/Keith Roberts
TIM No. 1019 - Mike Moran/The Rhythm Section (Alan Hawkshaw/Alan Parker/Barry Morgan/Les Hurdle/Frank Ricotti/Mike Moran)/Alan Parker/Alan Tew/Keith Roberts/Alan Hawkshaw/Keith Mansfield
TIM No. 1020 - Alan Parker/Keith Mansfield/Len Hunter/Harry Roberts/Les Hurdle/Frank Ricotti/Mike Moran/Len Beadle
TIM No. 1021 - Madeline Bell/Alan Parker/Kathleen Poppy/Les Hurdle/Mike Moran
TIM No. 1022 - Alan Parker/Les Hurdle/Mike Moran
TIM No. 1023 - Alan Hawkshaw/Mike Moran/David Lindup/Alan Parker/Les Hurdle/Alan Tew
TIM No. 1024 - Alan Tew
TIM No. 1025 - Alan Tew
TIM 1026 - Alan Parker/Mike Moran/Alan Hawkshaw
TIM 1027 - Alan Parker/Alan Hawkshaw/Mike Moran
TIM 1028 - Alan Parker
TIM 1029 - Barry Morgan/Ray Cooper
TIM No. 1030 - Frank Ricotti/Alan Parker/Barry Morgan/Mike Moran
TIM 1031 - Frank Ricotti/Tony Hymas/Stan Sulzmann/Les Hurdle
TIM 1032 - Tony Hymas/Frank Ricotti/Stan Sulzmann/Les Hurdle
TIM 1033 - Mike Moran
TIM 1034 - Alan Parker/Barry Morgan/Les Hurdle/Frank Ricotti
TIM 1035 - Mike Moran/Frank Ricotti
TIM 1036 - Ray Russell (Raymond Baldwin)
TIM 1037 - Ray Russell (Raymond Baldwin)/Mike Moran/Frank Ricotti/Alan Parker
TIM 1038 - Peter Acock/Clive Bunker/Rod Edwards/Gordon Giltrap
TIM 1039 - Alan Parker
TIM 1040 - Andy Clark/Charlie Morgan
TIM 1041 - Ron Aspery
TIM 1042 - David Reilly
TIM 1043 - Graham Preskett
TIM 1044 - Barry Vincent
TIM 1045 - Kevin Peek
TIM 1046 - David Reilly
TIM 1047 - Charlie Morgan/Andy Pask/Steve Tayton
TIM 1048 - Graham Preskett
TIM 1049 - Rod Argent/Robert Howes
TIM 1050 - Bill Nelson
TIM 1051 - Charlie Morgan/Andy Pask
TIM 1052 - Rob Waugh
TIM 1053 - Matthew Cang
TIM 1054 - Graeme Taylor
Additional info:
TIM No. 1012:
The THEMES T.I.M. Series is produced by Graham Walker.
Sleeves designed by Stobart-Sutterby.
TIM No. 1013:
The THEMES T.I.M. Series is produced by Graham Walker.
Sleeves designed by Stobart-Sutterby.
TIM No. 1014:
The THEMES T.I.M. Series is produced by Graham Walker.
Sleeves designed by Stobart-Sutterby.
TIM No. 1015:
The THEMES T.I.M. Series is produced by Graham Walker.
Sleeves designed by Stobart-Sutterby.
TIM No. 1016:
The Themes T.I.M. Series is produced by Graham Walker.
Designed by Stobart Sutterby.
Printed by Robot.
TIM No. 1017:
Sleeve designed by Stobart-Sutterby.
TIM No. 1018:
Sleeve designed by Stobart-Sutterby.
TIM No. 1019:
Sleeve designed by Stobart-Sutterby.
TIM No. 1020:
Sleeve designed by Stobart-Sutterby.
TIM No. 1021:
The corresponding backing tracks are issued on TIM 1022 THE SOUND OF SOUL. Therefore it is possible to edit from vocal to instrumental version and vice versa where commentary or scene changes occur.
Sleeve designed by Stobart-Sutterby.
TIM No. 1022:
Female vocal versions of these tracks are issued on TIM 1021 THE VOICE OF SOUL, and it is possible to edit from vocal version to instrumental version or vice versa where commentary or scene changes occur.
Sleeve designed by Stobart-Sutterby.
TIM No. 1023:
Sleeve designed by Stobart-Sutterby.
TIM No. 1024:
Part II of this suite is issued on TIM 1025-DRAMA SUITE PART II and is comprised of medium tempo rhythmic and melodic backgrounds, drama backcloths and scenechange bridges.
Sleeve designed by Stobart-Sutterby.
TIM No. 1025:
Part I of this suite is issued on TIM1024-DRAMA SUITE PART I and is comprised of the main theme, links, bridges, stings and underscores.
Sleeve designed by Stobart-Sutterby.
TIM No. 1030:
Cover design by V. & A. VARGO
TIM 1031:
Cover design by PAUL MORGAN
TIM 1032:
Cover design by PAUL MORGAN
TIM 1033:
Cover design by PAUL MORGAN
TIM 1034:
Cover design by PAUL MORGAN
TIM 1037:
Cover design by Neil Worley
TIM 1039:
Produced by John Deveraux
Sleeve artwork by Neale Worley
Design and production by Elron Press
TIM 1041:
Produced by John Devereaux
Sleeve artwork by Neale Worley
Design and production by Elron Press
TIM 1042:
Produced by John Devereaux
Sleeve artwork by Neale Worley
Design and production by Elron Press
TIM 1043:
Produced by John Devereaux
Sleeve artwork by Neale Worley
Design and production by Elron Press
TIM 1044:
Produced by John Devereaux
TIM 1045:
Produced by Kevin Peek
Sleeve artwork by Neale Worley
Production by Tim Jenns
TIM 1046:
Produced by John Devereaux
Sleeve artwork by Neale Worley
Design and production by Elron Press
TIM 1048:
Produced by John Devereaux
Sleeve artwork by Neale Worley
Production by Tim Jenns
TIM 1049:
Produced by Andrew McCrorie-Shand
Sleeve artwork by Neale Worley
Production by Tim Jenns
TIM 1050:
Produced by Bill Nelson
Recorded at the Echo Observatory, Yorkshire, England
Production by Creative Input
TIM 1051:
Produced by John Devereaux
Production and artwork by Creative Input
TIM 1052:
Produced by Colin Bilik
Production and artwork by Creative Input
TIM 1053:
Produced by John Devereaux for Fireworks Music Ltd
Recorded at Snake Ranch Studios, London
Engineered by Stephen Allan
Production and artwork by Creative Input
TIM 1054:
Produced by John Devereaux for Fireworks Music Ltd
Recorded at Snake Ranch Studios, London
Engineered by Austin Ince
Production and artwork by Creative Input