2 or 3 Voices with Instruments or Piano,
- F4.
- Cyfres
- 1998-[2009].
Dangos 32 canlyniad
Disgrifiad archifol- G2.
- Cyfres
- 1959-2013.
Choral music with piano or organ accompaniment. For choral music with brass band accompaniment, see works for 'Choir and Brass Band', D2/2.
- C2.
- Cyfres
- 1963-2012.
Chamber music for brass instruments.
- C8.
- Cyfres
- 1978-2012.
Chamber music including guitar.
- D3.
- Cyfres
- 1971-2011.
- E3.
- Cyfres
- 1961-2003.
Medium and Low Voice with Piano
- F2.
- Cyfres
- 1959-2013.
Music scores for medium or low voices and piano.
- F3.
- Cyfres
- 1961-[2014].
Operas for Schools (children's audience),
- A1.
- Cyfres
- 1964-2008.
Operas written to be performed by adults for an audience of school children. Many written to be performed by students of the Royal Welsh College of Music and Drama. May contain the full orchestral score with voices, a vocal score, orchestral score and a vocal score with piano reduction.
Children's Operatic Works (performed by children),
- A2.
- Cyfres
- 1997-2006.
Operatic works intended to be performed by children with professional adult singers and musicians. Most have libretto by Mark Morris.
- B1.
- Cyfres
- 1963-1987.
Music scores arranged for Chamber Orchestra.
Soloist with Orchestra/Concertos,
- B4
- Cyfres
- 1958-[2014].
Music scores for solo instrument accompanied by an orchestra.
- C3.
- Cyfres
- [1960?]-2013.
Music scores for sting instruments.
- C6.
- Cyfres
- [1990]-2012.
Music scores for mixed ensembles.
- C7.
- Cyfres
- 1983-2013.
Music scores for small ensembles including a harp.
Opera, Dance and Theatrical Works,
- A3.
- Cyfres
- 1959-2002.
Music scores of works or part works for stage performances. These could include opera, dance, dramatic and musical theatre.
- B2.
- Cyfres
- 1960-2014.
Mostly original music scores arranged for a full orchestra.
- C1.
- Cyfres
- 1961-2013.
Chamber Music for Woodwinds [includes some with horn, following original lists].
- C5.
- Cyfres
- 1976.
Chamber music for percussion instruments.
- D1.
- Cyfres
- 1974-2010.
Music scored for standard brass band unless indicated otherwise.
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