Bridget Radford – 2016, 2020 to date
Gareth Kirby – 2009 – 2015, 2017-2019
Hywel Benjamin – 2001 – 2008
Edward John – 1998 – 2000
Christopher Broome – 1997
John Morgan – 1988 – 1996
Enfys David-Jones/Williams – 1984 – 1987
David Lloyd Davies – 1982 – 1983
Ian Thomas – 1981
Paul Thomas – 1979 – 1980