[4] Baron's early television roles included small parts in Crossroads (1978), Up Pompeii (1970), Z-Cars (1971), and the British horror film Hands of the Ripper (1971).

She had a small part in Minder, and played the middle-aged temptress Lily Bless'er in the Last of the Summer Wine episode Getting Sam Home.

Baron then went on to star in the children's television series Come Outside (1993–1997) playing Auntie Mabel, an everyday woman living in a bungalow set in Denham, who flew around on various adventures in her spotted aeroplane with her dog Pippin, educating children on how things are created and where they come from by visiting various factories or farms and even looking at wildlife in zoos.

[4] In 1997, Baron played the minor part of Renee Turnbull in Coronation Street and took guest roles in dinnerladies (1998), The Mrs Bradley Mysteries (1998), Sunburn (1999), Nancherrow (1999) and Goodnight Sweetheart (1999).

[4] Baron continued to work regularly on television and the stage in the 2000s, with credits including Fat Friends (2000–2005), The Bill (2000), Doctors (2000, 2006, 2010, 2011 and 2014), Cinderella, Poole Arts Centre December 2001Peak Practice (2001), Holby City (2002 and 2006), Down to Earth (2005), Rome (2005) and Casualty (2009).

[4] Baron briefly appeared in the BBC One soap opera EastEnders in 2006 as Linda Clarke, the mother of Jane Beale, played by Laurie Brett.

On 8 April 2016, it was announced that Baron would return to EastEnders once again, alongside John Partridge, who portrayed her on-screen son Christian Clarke.

[4] Baron's film appearances include roles in The Small World of Sammy Lee (1963), Hot Millions (1968), Mrs. Brown You've Got a Lovely Daughter (1968), Can Heironymus Merkin Ever Forget Mercy Humppe and Find True Happiness?

She also appeared in the Barbra Streisand film Yentl (1983), Carry On Columbus (1992), Colour Me Kubrick (2005) and Scoop (2006) directed by Woody Allen.

[18] She appeared at the Minerva Theatre, Chichester from April to May 2014 in Stevie by Hugh Whitemore, alongside Zoe Wanamaker and Chris Larkin.

[21] This same year she voiced the character of Angela Jefferies in the BBC Radio 4 sitcom titled England's Glory opposite Keith Barron.

[21] In April 2012, Richard Kates released an album entitled There's Something About You, which featured Baron performing the track "A Hard Man Is Good to Find".