 He wrote many of their major hits, including "I'll Never Find Another You", "A World of Our Own", the million-selling "The Carnival Is Over" (the melody was based on a Russian folk song, while Tom Springfield wrote only lyrics for the song) and "Walk with Me".Around this same time, he co-wrote (with Clive Westlake) Frank Ifield's 1964 hit "Summer Is Over" and his sister Dusty's 1964 hit "Losing You".His other hit compositions include "Adios Amour (Goodbye My Love)", which was recorded by José Feliciano and The Casuals, and "Just Loving You", which became a 1967 top ten hit for Anita Harris.