She was involved in a controversial storyline where her character was fired from her teaching job and sent to prison after having an affair with one of her students Justin Burton, who was portrayed by Chris Fountain.

[4] Bastian joined the long-running ITV police drama The Bill as PC Sally Armstrong in 2007,[5][6] and departed in late 2009.

[10] In 2011, Bastian starred in the UK touring version of Bill Kenwright's production of Verdict by Agatha Christie, playing alter-ego Helen Rollander.

[11] In late 2018, it was announced that Bastian had joined the cast of the BBC daytime soap opera Doctors as Becky Clarke.

[14] Bastian explained that she had made the decision to leave Doctors to reduce her workload so that she could concentrate on getting pregnant in real life.