Quesnel has played Dr. Monica Broome in the first series of
Cardiac Arrest and
DC Grace Harris in the first two series of
Thief Takers. She had a recurring role in the third series of
Cold Feet as Emma Keaton and returned to medical dramas in 2006, playing Dr. Christine Whelan in
The Golden Hour. In 2007, she starred as Nita in the
BBC One series
True Dare Kiss, and later that year began a recurring role in
EastEnders as
Rachel Branning, taking over the character from
Sukie Smith. In February 2008, she played the spoken title role in a City of Birmingham Symphony Orchestra production of Stravinsky's
Perséphone, broadcast on
BBC Radio 3. In July 2008, she appeared in
an episode of the ITV murder mystery series,
Midsomer Murders as journalist Julie Benson, and in an episode of
George Gently entitled "The Burning Man", playing the character Wanda Lane. In March 2010, she appeared as Maureen in BBC One's second series of
Five Days. She also played the spaceship captain in the
Doctor Who 2010 Christmas special, "
A Christmas Carol". In November 2010, she appeared as
Christopher Eccleston's character's wife in
Jimmy McGovern's
Accused. From 2014 to 2015, she played the role of
Olga Fitzgerald, Geography teacher and Headteacher
Vaughan Fitzgerald's estranged wife in BBC's
Waterloo Road. The following year she played Dorothea Ames, Head teacher at Coal Hill Academy, in the BBC3 series
Class, and provided the voice of Yuria of Londor in the video game
Dark Souls III. She played Louise Wilson in BBC's
The A Word, and reprised the role more prominently in its spin-off series
Ralph & Katie. ==Personal life==