The annual Servant's Ball was popular among gay men long before homosexuality became legal. In the photo, men in drag attend the event at the Royal Albert Hall. Observers at the time were shocked by the scenes with one commenting: 'Groups of men dressed in coloured silk blouses and tight-lipped [sic] trousers. By their attitude and general behaviour they were obviously male prostitutes.'
Homosexuality was decriminalised 30 years later in 1967.
Thanks to The Metro