This is part of the Barbican's Pop Art season. Here is their introduction: A glance at the world of advertising in the late 60s, in which pretty girls strive for independence but fall pray to a society commandeered by men. This is the story of Marta (Maria Cabral), a young girl about to leave her husband in search for her true identity. The Circle was sold out for three months when it was first released in Portugal.
Here and above is a chance to see extracts from the movie.