What song or tone does Big Ben play?

Question

(be kinda specific)

Answer 1

It plays the melody known to grandfather clock owners the world over, the so-called Westminster Quarters (or Westminster Chimes or Cambridge Chimes): Mi do re sol, sol re mi do, etc. According to tradition, the melody has words: "O Lord our God/Be Thou our guide/That by thy help/No foot may slide", with variations.

Answer 2

The melody is known as Westminister Quarters, or Westminister Chimes, or Cambridge Chimes.

According to an inscription in the clockroom of Big Ben, the lyrics are "All through this hour/Lord, be my guide/And by Thy power/No foot shall slide."