Paris-based Indie Sales has closed a raft of deals for “Last Swim,” Sasha Nathwani’s debut which won the Crystal Bear at the Berlin Film Festival, including in the U.S. and the U.K.

Vertigo, whose track record include “Sound of Metal” and “Christmas Eve in Miller’s Point,” has picked up the film and will set a theatrical release for it on April 4th in the U.K. and in the summer in the U.S. “Last Swim” had its U.K. premiere at BFI London Film Festival last October.

Set over a hot summer day in London, the film follows British-Iranian teen Ziba as she leads her friends on an eventful journey across the city, culminating in a once in a lifetime astronomical event. The high-school year is ending, but despite the celebratory atmosphere, “Ziba struggles to retain her characteristic optimism as she finds herself battling the intrusive...