She attended St Paul's Girls School in Hammersmith, London, before gaining a BA in English Literature[1] from the University of Birmingham.
While at St Paul's Girls School, she sang as part of the City Charmers, an all-female close harmony group, which won the TV talent contest Sky Star Search in 1990.
In 2001, Dimbleby recorded an album of Peggy Lee songs, Ain’t this Cosy?, on the Black Box label with the Geoff Eales trio.
In 2002, she devised a theatrical show, Music to Watch Boys By, which played at the Bridewell Theatre in London and at The Pleasance in Edinburgh, before touring around the UK.
In 2003, she performed a sell-out tribute concert to Peggy Lee at the Royal Festival Hall[1] After four years' break from singing to train as an Alexander Technique teacher and start a family,[5] Dimbleby wrote, recorded and released an album, Things As They Are, in 2007.