By 1960 Kershaw was an experienced script writer with credits on programmes like Knight Errant Ltd, and Biggles. He was the first script-editor of Coronation Street and also the first person other than show creator Tony Warren to write for the show penning episodes 13 to 16. On leaving the Street, he retired to Prestatyn, North Wales where he lived until his death in 1992, aged 73. In the 2010 dramatisation The Road to Coronation Street, Kershaw was portrayed by John Thomson.