Diana Flacks appeared on Coronation Street as the Chairwoman who was present on the bench at Weatherfield Magistrates Court when Sunita Alahan entered her "not guilty" plea on charges of assisting unlawful immigration and bigamy in October 2004.
In 1965 she appeared in the untransmitted Christmas Special of Pardon The Expression, and credited for roles in Z Cars, Play for Today, Crown Court, All Creatures Great and Small, Emmerdale, The League of Gentlemen, Heartbeat, The Royal Today and Two Pints of Lager and a Packet of Crisps. On stage she has appeared in productions including The Dybbuk, The Assignment, Come Blow Your Horn, Magic Lamp, Habeas Corpus, Pygmalion, Love on the Dole and The Dresser.