THE SMALLEST SHOW ON EARTH (1957, UK, 80m, U) ***½ Comedy dist. British Lion Film Corporation (UK), Times Film Corporation (USA); pr co. British Lion Films; d. Basil Dearden; w. William Rose, John Eldridge (based on a story by William Rose); pr. Michael Relph; ph. Douglas Slocombe (B&W | 1.66:1); m. William Alwyn; ed. Oswald…