In October 2023, when the cast of the iconic play Les Misérables performed at the Sondheim Theatre in London, they launched into their famous protest song, ‘Do You Hear the People Sing?’ as a part of their act. But what happened after that was entirely unscripted. The stage was abruptly taken over by activists from the Just Stop Oil movement as their t-shirts and banners proclaimed, while they chanted to the audience to ‘join the rebellion’.