Complex sentence: During the 1960s he worked with Kathy McGowan who presented "Ready Steady Go"; he was press agent for a number major artists such as Sonny & Cher, Cream, Robert Stigwood and for Brian Epstein's Saville Theatre.
Split into simpler sentences: During the 1960s, Williams worked with Kathy McGowan, who presented "Ready Steady Go". He was also a press agent for a number major artists such as Sonny & Cher, Cream, Robert Stigwood, and for Brian Epstein's Saville Theatre.