1989
The greenhouse effect: an examination of the evidence
Held at the University of Sheffield in conjunction with the 1989 meeting of
the British Association for the Advancement of Science
Chair: Lord Dainton
Principal speaker: Dr John Houghton 
Questioners: A. Crane, W. Heal, J. Leggett and F. Pearce

1990
Human embryo research: what are the issues? 
Held at the University of Swansea in conjunction with the 1990 meeting of
the British Association for the Advancement of Science
Chair: Professor Ian Kennedy
Principal speaker: Dr Martin Johnson 
Questioners: J. Marshall, B. Modell, C. Rodeck and G. Vines

1991
Drug addiction: myths and realities 
Held at the Polytechnic South West, Plymouth, in conjunction with the 1991 meeting of the British Association for the Advancement of Science
Chair: Baroness Blackstone
Principal speaker: Professor Griffith Edwards
Questioners: J. Jacob, A. Maynard, J. Strang and G. Watts

1992
Organic farming: at what cost?
Held at the University of Southampton in conjunction with the 1992 meeting of the British Association for the Advancement of Science
Chair: Sir John Quicke
Principal speaker: Professor Colin Spedding
Questioners: D. Conning, M. Murphy, C. Stopes and T. Wickham

1993
Can we prolong our lives?
Held at Keele University in conjunction with the 1993 meeting of
the British Association for the Advancement of Science
Chair: Sir Richard Doll
Principal speaker: Professor John Grimley Evans
Questioners: K. Boyd, T. Kirkwood, E. Midwinter and G. Shaper

1994
Complementary medicine: does it work? 
Held at Loughborough University of Technology in conjunction with the 1994 meeting of the British Association for the Advancement of Science
Chair: Professor Michael Peckham
Principal speaker: Professor Edzard Ernst
Questioners: T. Brewin, F. Fisher, P. Pietroni and D. Reilly

1995
Tissue transplantation: science, law and ethics 
Held in London as part of SET95
Chair: Dr Geoff Watts
Principal speaker: Sir Roy Calne
Questioners: G. Ferry, R. Gillon, C. Pallis and R. Richardson

1995
Genetic screening: what are the limits?
Held at the University of Newcastle upon Tyne in conjunction with the 1995 meeting of the British Association for the Advancement of Science
Chair: Dr Onora O'Neill
Principal speaker: Professor Kay Davies
Questioners: B. Dixon, D. Cook, T. Marteau and P. Smee

1996
Alcohol: friend or foe?
Held at the University of Birmingham in conjunction with the 1996 meeting of the British Association for the Advancement of Science
Chair: Baroness Lloyd of Highbury 
Keynote speaker: Dr Peter Anderson 
Panellists: M. Farrell, P.J. Graham, P. Mitchell and D. Rutherford

1997
Pigs, primates & people: concerns and challenges in organ transplantation 
Held at the University of Leeds in conjunction with the 1997 meeting of
the British Association for the Advancement of Science
Chair: Professor John Durant 
Keynote speaker: Professor David Onions 
Panellists: D. Morton, A. Suckling, J. Wallwork and M. Walport

1998
Genetically modified food: yes or no?
Held at the University of Wales, Cardiff in conjunction with the 1998 meeting of the British Association for the Advancement of Science
Chair: Lord Mustill
Keynote speaker: Professor Derek Burke
Panellists: T. Combes, B. Dixon, N. Poole and I. Taylor

1999
Energy for the 21st century: what are the choices?
Held at the University of Sheffield in conjunction with the 1999 meeting of
the British Association for the Advancement of Science
Chair: Vivienne Parry 
Keynote speaker: Professor Dennis Anderson
Panellists: C. Anastasi, D. Elliott, G. MacKerron and P. Mallaburn