Crerar played Amanda for 3 years in the BBC Wales Drama Series Belonging, directed by Euros Lyn and Rhys Powys among others.
She played Stella in Casualty (TV series) a guest lead opposite Danny Dyer and Abi Titmuss and Hannah in EastEnders alongside Charlie Brooks.
Natasha in Three Sisters BBC Radio 3 directed by Alison Hindell For the stage she has played: Sylvia with Steven Berkoff in the premiere of Berkoff's play Sit and Shiver, Cressida in Terry Hands' production of Troilus and Cressida, at Clwyd Theatr Cymru, Mold, Emma, in Jane Austen's Emma directed by John Adams at the Haymarket Theatre, the northern stage premiere of Tom Stoppard's Rock 'n' Roll at the Library Theatre, Manchester, alongside Hilton McRae and Graham Awly, Emilia in Frantic Assembly's award-winning Othello at the Lyric Theatre Hammersmith, with Jimmy Akingbola as Othello, Christina in Headlong theatre company's much acclaimed autumn production Decade directed by Rupert Goold, at St Katharine Docks.
In 2013 she was scheduled to play Lady Macbeth at the Tron Theatre Glasgow, and Perth, directed by Rachel O'Riordan.
Other Factory members include Alex Hassell, Catherine Bailey, Alan Morrissey, John Hopkins and Laura Rees.