John Singer

From Wikipedia:

John Harold Singer was an English actor. He began as a child actor, popular in the 1930s, and known for Sweeney Todd: The Demon Barber of Fleet Street. In later years he continued to act in numerous films, including In Which We Serve and The Cruel Sea. He died on 7 July 1987 in Tunbridge Wells, Kent, England. His son, Steven Singer, became a TV scriptwriter.