2017 Hugh Brody    
2015 Jean Lydall    
2013 David MacDougall    
2011 Dai Vaughn    



 
2009 Asen Balicsi    
2007 Colin Young  (Occasion of 1st Colin Young Lecture)  
2004 John Marshall    



 
1992 Brian Moser    
1992 Timothy Ash    
1990 Ian Dunlop