I'Anson first started as a broadcaster on the then pirate radio station Kiss FM, and through to its legal licence, presenting the magazine show The Word.

From 1995 to 1996, she presented the weekday lunchtime show on BBC Radio 1,[3] taking over from Emma Freud.

In August 1998, during Radio 1's annual visit to Ibiza, I'Anson failed to turn up for work after a night of clubbing.

Although it has been widely reported that she was sacked by the BBC as a direct result,[4][5][6] she was reportedly given a final warning, had her wages docked, and was made to issue an apology to her fellow presenters and crew[7] and left the station by "amicable agreement" six months later.

In 2008, she hosted a Sunday afternoon show on London radio station Magic 105.4.