Every 10 years, the British Film Institute (BFI) gathers together a collection of film directors and critics and asks them to name the greatest film of all time.
The resulting list is known as the Sight & Sound poll, and is considered one of the more prestigious lists from the multitude that proclaim to tell us the best film ever made.
Its prestige comes from the number of critic contributors (more than 1,600 this year), the calibre of its voters — this year's directors' poll includes Martin Scorsese, Barry Jenkins, Sofia Coppola, and Bong Joon Ho — and the fact it happens once a decade.
