While working in galleries, Walsh attended comedy writingevening classes including Stand up and Deliver and as a direct result wrote for Jo Caulfield on BBC Radio 4. In 2006 she switched to comedy full-time. In 2007, Walsh was approached by Frank Skinner to appear in a TV pilot for Avalon Entertainment, Frank Skinner's Skateboarding Dog. Walsh was runner-up in AmusedMoose LaughOff 2006 on the Edinburgh Fringe, appeared at the Edinburgh Festival Fringe in 2007 and 2008, and appeared at Afterhours in between writing and filming, as well as co-hosting the AmusedMoose LaughOff 2009 with Jack Whitehall. In 2009, Walsh wrote for and appeared on The Now Show on BBC Radio 4, appeared on Winging It on BBC Switch, and made videos for Current TV. Walsh is also an occasional contributor to comedy podcast Answer Me This!. In January 2009, Walsh created a comedy film night called with Jon Petrie. In the summer of 2009, Walsh was a co-host and writer of Channel 4's TNT Show. In August 2011, Walsh was nominated for an , in recognition of her first full hour-long show. She received critical acclaim for the show, which drew on her life since breaking her arm in the Worthing Birdman Competition in August 2010. She has also appeared on So Wrong It's Right, a BBC Radio Four comedy presented by Charlie Brooker. Walsh co-wrote Dead Boss with Sharon Horgan, a British sitcom set in Broadmarsh Prison, starring both Sharon Horgan and Jennifer Saunders. The show began airing on BBC3 in June 2012. She has appeared on TV shows, such as Edinburgh & Beyond on the Paramount Comedy Channel, The Late Edition, The Matt Lucas Awards, Mock the Week, QI, and Would I Lie to You?. She has appeared on the radio comedy shows Out to Lunch on BBC Radio 2, Just a Minute, winning on her debut broadcast on 3 March 2014, The Unbelievable Truth and The News Quiz''. Walsh took a break from comedy after having a baby in 2015.
Other work
In 2008 Walsh was a stand-in continuity presenter for CBBC and for its show All Over the Place. On 12 June 2009, Walsh was a guest panellist on 8 Out of 10 Cats, on 18 August 2009 appeared on You Have Been Watching, Newswipe with Charlie Brooker, and on 3 September on Mock the Week. On 15 October, she also appeared on the third episode of the new series of Never Mind The Buzzcocks, on Noel Fielding's team. On 13 September she appeared on Phill Jupitus's team along with JLS. On 15 August 2010, Walsh injured herself with a suspected dislocated shoulder and fractured arm after leaping from the pier during the annual WorthingInternational Birdman festival. On 8 October 2010, she appeared on 8 out of 10 Cats still with her arm in a sling, saying that she had of metal in her arm. Walsh appeared on Celebrity Mastermind on 30 December 2012, coming second to Ken Bruce. Her chosen subject was badgers.
