Pearly kings, queens, princes and princesses gather in central London for the annual Costermongers Harvest Festival. The so-called pearly kings decorate their clothes with mother of pearl buttons, in a working class tradition founded by road sweeper named Henry Croft in the 1870s. It can take up to two years to finish an outfit, with some weighing close to 12 kilograms. The Harvest Festival is held on the last Sunday of September and sees pearly kings and queens from across London assemble in Guildhall Yard to sing traditional cockney songs, dance, and make merry, before marching to St Mary-le-Bow church to donate goods to charity and attend a special church service. IMAGES AND SOUNDBITES