Frank Mills (British actor)

Frank Mills (born 1929 in London) is an English actor who has starred in numerous films and television series such as Rumpole of the Bailey. He is best known for his television work, notably the role of Billy Williams in Coronation Street. He has appeared in series such as The Brief, Midsomer Murders, Foyle's War, Flambards and The Palace.
He played Commissionaire Peterson 'The Blue Carbuncle' episode of The Adventures of Sherlock Holmes in 1984, and appeared in Season Three of Hetty Wainthropp Investigates playing Frank Wainthropp (1997).
He, Linal Haft and Paul Brooke are the only actors to appear in both the Classic and New series of Minder, but starring in different roles in each.