- E3.
- Cyfres
- 1961-2003.
Dangos 32 canlyniad
Disgrifiad archifolMedium and Low Voice with Piano
- F2.
- Cyfres
- 1959-2013.
Music scores for medium or low voices and piano.
2 or 3 Voices with Instruments or Piano,
- F4.
- Cyfres
- 1998-[2009].
- 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.
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.
- F3.
- Cyfres
- 1961-[2014].
- C7.
- Cyfres
- 1983-2013.
Music scores for small ensembles including a harp.
- C6.
- Cyfres
- [1990]-2012.
Music scores for mixed ensembles.
- E4.
- Cyfres
- 1961-2013.
- E5.
- Cyfres
- 1977-2013.
- E6.
- Cyfres
- 1965-2013.
- F1.
- Cyfres
- 1963-2014.
Song cycles and single songs.
- G1.
- Cyfres
- 1958-2013.
Compositions and arrangements of unaccompanied choral music.