There is a significant moment when one of the mass of dancers, a woman, notices the camera, and stares, horrified, straight into the intrusive lens. Suddenly, there are intimations of another London, of the coming surveillance society. The future is visible in that one brief shot, the shocking realisation that an unguarded, intimate occasion can be recorded, catalogued, exploited in some way over which the involuntary actor will have no control.
From The Festival of Britain, 60 years on.
(Yes, it's been ages since I posted - life has gotten in the way of many things).