The first radio drama, a scene from Julius Caesar, was broadcast 90 years ago. Now performed by Harriet Walter and Jenny Jules from Phyllida Lloyd's all-female Donmar Warehouse production. Introduced by Jeremy Mortimer

Lawyer Shami Chakrabarti chooses Isabella's speech from Measure for Measure (Act 2 Scene 2) as the piece of Shakespeare that inspired her most. Reader: Hattie Morahan.