text: * 1946&ndash;1962 Ernest Basil Verney
  * 1962&ndash;1971 Arnold Burgen
  * 1973&ndash;1978 Gustav Victor Rudolf Born
  * 1979&ndash;1999 Alan Cuthbert  
  * 1999&ndash;2013 Peter Anthony McNaughton
  * 2017&ndash;2022 John Michael Edwardson
  * 2022&ndash;present Mark Howarth