1970
 Danger Inside  Falkland Cary & Ivan Butler
 Witch Errant  R.A. Dick

1971
 Playgoers  Arthur Pinero
Midsummer Mink  Peter Coke

1972
 Ritual for Dolls  George McEwan Green
Shadow in the Sun  Maurice McLoughlin

1973
 Blowing in the Wind*  John Wilson
Quiet Weekend  Esther McCracken

1974
 Towie Castle  Gordon Bottomley
Waiting in the Wings  Noël Coward

1975
 The Long Christmas Dinner  Thornton Wilder
The Cage Birds  David Campton
Bonaventure  Charlotte Hastings

1976
 The House on Sadovaya Street  Jean Christie
Mother's Day  J.B. Priestley
Dangerous Corner  J.B. Priestley

1977
 One Possessed  David Campton
Farewell Ploy*  Alan Richardson
Wild Goose Chase  Derek Benfield

1978
 Deadline Dawn  Anthony Booth
The Tinder Box  Nicholas Stuart Gray

1979
A Fine Gentleman  Alan Richardson
 A Victorian Evening  Various
Confusions  Alan Ayckbourn