The BAFTA Award for Best Screenplay is a British Academy Film Award for the best script. It was awarded from 1968 to 1982. In 1983 it was split into BAFTA Award for Best Original Screenplay and BAFTA Award for Best Adapted Screenplay.
1982: Missing – Costa-Gavras and Donald E. Stewart
E.T. the Extra-Terrestrial – Melissa Mathison
Gandhi – John Briley
On Golden Pond – Ernest Thompson
1981: Gregory's Girl – Bill Forsyth
Atlantic City – John Guare
Chariots of Fire – Colin Welland
The French Lieutenant's Woman – Harold Pinter
1980: Being There – Jerzy Kosiński
Airplane! – Jim Abrahams, David Zucker, and Jerry Zucker
The Elephant Man – Christopher De Vore, Eric Bergren, and David Lynch
Kramer vs. Kramer – Robert Benton
1979: Manhattan – Woody Allen and Marshall Brickman
The China Syndrome – Mike Gray, T. S. Cook, and James Bridges
The Deer Hunter – Deric Washburn
Yanks – Colin Welland and Walter Bernstein
1978: Julia – Alvin Sargent
Close Encounters of the Third Kind – Steven Spielberg
The Goodbye Girl – Neil Simon
A Wedding – John Considine, Patricia Resnick, Allan F. Nicholls, and Robert Altman
1977: Annie Hall – Woody Allen and Marshall Brickman
Equus – Peter Shaffer
Network – Paddy Chayefsky
Rocky – Sylvester Stallone
1976: Bugsy Malone – Alan Parker
All the President's Men – William Goldman
One Flew Over the Cuckoo's Nest – Lawrence Hauben and Bo Goldman
The Sunshine Boys – Neil Simon
1975: Alice Doesn't Live Here Anymore – Robert Getchell
Dog Day Afternoon – Frank Pierson
Jaws – Peter Benchley and Carl Gottlieb
Nashville – Joan Tewkesbury
1974: Chinatown – Robert Towne / The Last Detail – Robert Towne (TIE)
Blazing Saddles – Mel Brooks, Norman Steinberg, Andrew Bergman, Richard Pryor, and Alan Uger
The Conversation – Francis Ford Coppola
Lacombe, Lucien – Louis Malle and Patrick Modiano
1973: The Discreet Charm of the Bourgeoisie – Luis Buñuel and Jean-Claude Carrière
The Day of the Jackal – Kenneth Ross
Sleuth – Anthony Shaffer
A Touch of Class – Melvin Frank and Jack Rose
1972: The Hospital – Paddy Chayefsky / The Last Picture Show – Larry McMurtry and Peter Bogdanovich (TIE)
Cabaret – Jay Presson Allen
A Clockwork Orange – Stanley Kubrick
1971: The Go-Between – Harold Pinter
Gumshoe – Neville Smith
Sunday Bloody Sunday – Penelope Gilliatt
Taking Off – Miloš Forman, John Guare, Jean-Claude Carrière, and Jon Klein
1970: Butch Cassidy and the Sundance Kid – William Goldman
Bob & Carol & Ted & Alice – Paul Mazursky and Larry Tucker
Kes – Barry Hines, Ken Loach, and Tony Garnett
They Shoot Horses, Don't They? – James Poe and Robert E. Thompson
1969: Midnight Cowboy – Waldo Salt
Goodbye, Columbus – Arnold Schulman
Women in Love – Larry Kramer
Z – Costa-Gavras, Jorge Semprún
1968: The Graduate – Calder Willingham and Buck Henry
if.... – David Sherwin
The Lion in Winter – James Goldman