On the verso of the photograph: "Addressing the Thirty Thousand: London: White-haired Lord Russell is seen on the raised platform within Trafalgar Square in London this afternoon addressing some thirty thousand people who crowded around him. The audience included over ten thousand marchers who spent the holiday week-end on a journey from both Aldermaston and Wethersfield. At Lord Russell's right is Canon John Collins (spectacles and beret) who is the Chairman of the Campaign."