The question asks to identify the English playwright known for writing screenplays based on specific novels: Marcel Proust’s In Search of Lost Time, John Fowles’s The French Lieutenant’s Woman, and Margaret Atwood’s The Handmaid’s Tale.

Playwright Harold Pinter Screenplays

Harold Pinter (1930-2008) was a Nobel Prize-winning English playwright, screenwriter, and director. He is renowned for his contributions to modern drama and his work in screenwriting.

Notable Screenplay Adaptations

• The French Lieutenant's Woman (1981): Harold Pinter wrote the screenplay for this critically acclaimed film adaptation of John Fowles's novel.
• The Handmaid's Tale (1990): Pinter also penned the screenplay for the film adaptation of Margaret Atwood's dystopian novel.
• In Search of Lost Time: While Pinter did adapt Proust's novel for a BBC Radio 4 production in 2000, his major screenplays were for the other two works mentioned. His body of screenplay work is extensive and includes adaptations of other literary pieces.

Considering his significant contributions to adapting these specific novels into screenplays, Harold Pinter is the correct answer.

Other Playwrights' Contributions

• John Arden, Edward Bond, and David Hare are notable English playwrights, but they are not primarily associated with screenwriting adaptations of these particular novels. Their focus and major works lie elsewhere in theatre and sometimes film, but Pinter's connection to these specific adaptations is well-documented.