Her next screen role was far more substantial, appearing as Kate Spiller in the popular CBBC show Big Kids in 2000, alongside Imogen Stubbs, Duncan Duff and Matt Adams.
Then came an appearance in London's Burning in 2001 (Series 13,Episode 14) where she played a Girl Guide caught up in an arson attack.
Her last role to date was in Out of Bounds, a 2003 film starring a young Sophia Myles and Sophie Ward, in which Salmon played Phoebe Benallack.
As well as her appearances in film and TV, she has also appeared in a number of professional and amateur theatre productions, including Annie in the West End in 1998, when she played the part of Duffy and on the productions UK Tour, as 'Annie' in 2000.
Her progress through the auditions of Annie in 1998 and parts of the subsequent show were shown on the BBC series 8:50 to Paddington Green.