London-based trio London Grammar have premiered the video for "Strong", a track from their upcoming debut album If You Wait. Directed by Sam Brown - who has worked for Jay Z and Adele - the visuals see the band wandering the streets of a deathly quiet Los Angeles while a father and son arrange a firework display with a twist. The song itself features strong vocals from Hannah Reid, which have been described as "a perfect combination of Florence Welch and Lana Del Rey", on top of a Massive Attack-esque backing track. "Strong" is out on 1 September and their debut album If You Wait is out on 9 September via Metal & Dust Recordings. Watch above!