The first musical written by the duo Rodgers and Hammerstein, based on Lynn Riggs's play Green Grow the Lilacs. It ran for 1,543 performances on the West End during the first run. And, let's face it, the music has coloured every beautiful morning in the UK since 1947 - I usually open my windows and bellow 'Oh, What a Beautiful Morning!' much to the dismay of my neighbours.