When it comes to Quentin Tarantino movies, the music is always as vital as the pictures, and Once Upon A Time In Hollywood is no different.

Tarantino’s ninth film came out to great fanfare, and some of the loud cheers came from London sync outfit Pop-Up Music. Co-founded by Jim Meacock and Mark Garfield, it specialises in “rare gems” and scored three syncs for the film.

The pair had been sending tracks to Tarantino’s music supervisor Mary Ramos for a ...