Arnold has portrayed regular characters in EastEnders, Coronation Street, Emmerdale, Hollyoaks and Doctors.
Eyes, Rockliffe's Babies, The Bill, The Russ Abbot Show, The Jim Davidson Show as well as Jim Davidson's sitcom Up the Elephant and Round the Castle, Miss Marple, All Creatures Great and Small, Birds of a Feather, Jonathan Creek, M.I.T.
: Murder Investigation Team, Footballers' Wives: Extra Time, Holby City and Doctors.
She has also appeared in TV specials such as Oliver Twist, Minder on the Orient Express and, in 2009, she won an award for best actress ater starring opposite John Altman in the feature film Photoshoot.
Other West End appearances include Hollywood Babylon, Women Behind Bars, Four in a Million, and Last of the Red Hot Lovers at the Strand.