| Monteverdi | L’Incoronazione di Poppaea | Edition performed Leeds 1979, Cambridge 1981, revised Leeds 2006 |
| Longstaff | Dorian | Full-length ballet score, 20 performances Kiel 1984-5 |
| Franck | Prélude, Fugue et Variation | Orchestrated for choreography Kiel 1986 |
| Kern | Show Boat | Arranged orchestral material for Opera North production and tour 1989-91 |
| Schneitzhöffer | La Sylphide | Full length ballet score freely revised and completed Summer 1991, première Koblenz 9/1991, new production Lüneburg 1/1993 |
| Donizetti | L’Elisir d’Amore | Reduced orchestration made for Clonter Opera Farm 8/1991, newly revised and completely retypeset July 2012 |
| Tchaikovsky | Does the day reign? | Song orchestrated for performance by Joan Rodgers, Paul Daniel and the English Northern Philharmonia, Edinburgh Festival 1992 |
| Dvorák | Wind Serenade | Arranged for small orchestra to accompany choreography by Graham Lustig, Northern Ballet Theatre première 2/1993 |
| Prokofiev | Romeo and Juliet | Reduced orchestration made for Northern Ballet Theatre première 2/1993, published Boosey and Hawkes |
| Philip Feeney | Cinderella | Orchestrated approximately 20% of full-length ballet to facilitate completion by deadline, première 9/1993 |
| Mozart | Arias Smanie implacabili, Non so più, Voi che sapete | Reduced orchestration made for Scottish Chamber Orchestra Ensemble 10/1993 |
| Tchaikovsky | Swan Lake | Reduced orchestration made for Northern Ballet Theatre, première 9/1994, new production with different music/orchestration 2/2004 version for the State Street Ballet in California 8/2008; version for Southern Illinois Music Festival 5/2013 and several subsequent versions |
| Smetana | The Bartered Bride | Reduced orchestration made of complete opera for Welsh National College of Music and Drama, 9/1995 |
| Parry | Jerusalem | Scoring for large orchestra, 9/1995 |
| Bill Connor | The Dancing Princesses | Opera orchestrated for performance by London W11 Children’s opera, 12/1995 |
| Minkus | Don Quixote | New orchestration made for Northern Ballet Theatre, première 3/1996 |
| Carl Davis | A Simple Man | Version for student orchestra made for City of Salford Youth orchestra (NBT Education project), première 7/1996 |
| Adam | Giselle | Reduced orchestration made for Northern Ballet Theatre, première 9/1997; new versions made for Northern Ballet 2011 and Southern Illinois Music Festival 2011 |
| Handel | Messiah | Revision of Mozart orchestrations, performed Chesterfield Voices for Hospices 10/1997 |
| Tchaikovsky | Eugene Onegin | Chamber version of complete opera for seven players made for Clonter Opera Farm, première 10/1997, subsequent performances at the 1998 Buxton Festival: clarinet, horn, string quartet and piano |
| Gershwin | By Strauss | Song orchestrated for Sheffield SO 12/1998 |
| Handel | Music for the Royal Fireworks | Version for symphonic wind band; performed 1/1999 SSO, 3/1999 North of England Chamber Orchestra |
| Bizet | Carmen | Orchestral version of opera made for dance production by Northern Ballet Theatre, première 2/1999, subsequent production with Les Grands Ballets Canadiens, Montreal October 2000 |
| Grieg | Wedding Day at Troldhaugen | Version for wind quintet and piano, 8/1999 |
| Thea Musgrave | Celebration Day | Vocal score made of work for chorus and orchestra, published by Novello’s 6/1999 |
| Victor Herbert | Art is calling for me | Song from ‘The Enchantress’ orchestrated 12/1999 |
| Elgar | Great Expectations | Ballet by Stefano Giannetti after Charles Dickens: reduced orchestrations made of various works (including ‘Cockaigne’ and 2nd & 4th movts. 1st symphony) – première Northern Ballet Theatre 02/2000 |
| Wagner | Tristan und Isolde | Arrangement of complete opera for two pianos commissioned by Camberwell Pocket Opera, premiere 05/2000 Linbury Studio Theatre, Royal Opera House, Covent Garden |
| Param Vir | Ion | Vocal score made of opera (performances Aldeburgh and Almeida Festivals June 2000 |
| Gualtiero Dazzi | La Rosa del Ariadna | Vocal score made of opera 12/2000 |
| Humperdinck | Hänsel und Gretel | Chamber version of complete opera for seven players made for Opera North Educational Tour, première 06/2001: clarinet doulbing bass clarinet, horn, string quartet and piano |
| Puccini | Madame Butterfly | Ballet in two acts by David Nixon – orchestral version of opera made for dance production by Northern Ballet Theatre, première 2/2002 |
| Gershwin | I Got Rhythm | The Genius of Gershwin in Song and Dance (ballet by David Nixon, versions for small orchestra of An American in Paris, Cuban Overture, Rhapsody in Blue, excerpts from Porgy and Bess, and Girl Crazy (scenario for orchestra) – Northern Ballet Theatre première 5/2002 |
| Handel arr. (attrib.) | Mozart Judas Maccabaeus | Score edited and copied for performance by Halifax Choral Society, (material available in Novello Hire Library), Anglia TV recording for BBC Choice 6/2002, 1st performance in Germany Halle 6/2004 |
| Mendelssohn | A Midsummer Night’s Dream | Ballet by David Nixon – music adapted and arranged from various pieces by Mendelssohn and Brahms – Northern Ballet Theatre première 09/2003 |
| Verdi arr. Allan Stephenson | La Traviata | Ballet by Veronica Paeper – reduced orchestration made for restaging by Northern Ballet Theatre 02/2005 |
| Walton | Façade | Piano reduction revised and completed of Façade 1 and 2 plus some additional numbers for Oxford University Press September 2005 |
| Malcolm Arnold | The Three Musketeers | Ballet by David Nixon – music adapted and arranged JL – Northern Ballet Theatre première 9/2006, recording on Quartz CD 2/2007 |
| Various Composers | A Sleeping Beauty Tale | Ballet by David Nixon – reduced orchestrations of music by Tchaikovsky, Mussorgsky and Rimsky-Korsakov – Northern Ballet Theatre première 2/2007 |
| Leoncavallo | Pagliacci | Reduced orchestration of complete opera for Haddo House opera première 4/2007 |
| Tchaikovsky | The Nutcracker | Ballet by David Nixon – reduced orchestration of complete ballet Northern Ballet Theatre première 10/2007 |
| Lovenskjøld | La Sylphide | Ballet by August Bournonville; reduced orchestration of complete ballet for The Washington Ballet (première 02/2009); revised for the Opéra National de Bordeaux 11/2020) |
| Minkus | La Bayadère Act 2 (The Kingdom of the Shades) | Reduced orchestration for Northern Ballet Theatre première 02/2009 |
| Claude-Michel Schönberg | Cleopatra | Ballet by David Nixon, score transcribed and orchestrated for Northern Ballet 02/2011 |
| Various Composers | Beauty and the Beast | Ballet by David Nixon – reduced orchestrations of music by Saint-Säens, Bizet, Debussy and Glazunov – Northern Ballet première 12/2012, previous version with different music 12/2002 |
| Debussy | Prélude à l’après-midi d’un faune | Reduced version 1110 0000 harp, piano, harmonium, strings for Ivan Putrov, Sadler’s Wells Theatre 03/2012 |
| Various Composers | The Ugly Duckling | Ballet by Dreda Blow and Sebastian Loe – chamber versions of music by Borodin, Gounod, Saint-Säens, and many pieces of library music: – Northern Ballet première 10/2012, UK tour and CBeebies film 03-04/2013 |
| Mozart | The Marriage of Figaro | Reduced orchestration for Young Opera Venture (première 2/2013), 1111 1000 strings (+ keyboard for recitatives) |
| Richard Rodney Bennett | The Great Gatsby | Orchestrations (with Gavin Sutherland) for ballet by David Nixon, Northern Ballet 03/2013 |
| Mozart | The Magic Flute | Reduced orchestration for Young Opera Venture (première 9/2014), 1111 1110 timp strings (+ keyboard for keyed glockenspiel) |
| Tchaikovsky | Sleeping Beauty | Reduced orchestration of complete ballet: version for the Tallahassee Ballet 2014; version for Tupelo Ballet 2016; version for Mazatlan Ballet Mexico 2018 and several other versions |
| John Longstaff | Goldilocks and the Three Bears | Ballet by Nicola Gervasi – original composition by JL: – Northern Ballet première 10/2016, UK tour and CBeebies film 04/2017 |
| John Longstaff | Lift up your Heart | Anthem for SATB choir and organ, commissioned and broadcast by the Halifax Choral Society Radio 4 Sunday Worship 1/7/2018 |
| Minkus | Don Quixote | Reduced orchestration for the Greek National Ballet 10/2020 |
John Longstaff 