When Agnetha and Frida sang “Thank you for the music” back in 1977, they probably weren’t counting on the untamed tones of Tilda Swinton and George MacKay warbling away in a post-apocalyptic bunker.
Frankly, almost 50 years later, even those familiar with the unorthodoxies of film-maker Joshua Oppenheimer (no relation to the bomb-maker) might not have predicted this peculiar musical. The director himself included.
