Smashing Time (1967)
Directed by Desmond Davis, Written by George Melly
Starring Rita Tushingham, Lyn Redgrave, Michael York
(Spoiler alerts throughout)

The theme of rural or provincial innocents abroad in the wicked city is a familiar source of comedy and satire.
In the 1967 British film Smashing Time, starring Rita Tushingham and Lynn Redgrave, the innocents are Northern girls Brenda and Yvonne, and the city is London in the latter throes of its Swinging Sixties’ phase.