Documentary Premiere

At Guild Hall

 “1 Way Up,” a documentary about two London teenagers struggling to escape their gang-torn neighborhood by competing in a BMX bike competition, will be screened at Guild Hall on Saturday at 3:30 p.m., in advance of its theatrical premiere in London.

Directed by Amy Mathieson, the film is a production of Shine Global, a nonprofit film production company in New York dedicated to ending the abuse and exploitation of children. Tickets to the benefit screening, at $25, $10 for children, are available at the Guild Hall box office.