[1] During her career, Walter has worked with film and theatre directors including Peter Hall, Gregory Doran, Sam Mendes and Christopher Guest.

Her other notable television appearances include in The Thin Blue Line, and Harry Enfield & Chums, the Doctor Who episode "Turn Left".

[6] In 2008 to early 2009 she spent a year as a member of the Royal Shakespeare Company (RSC), with leading roles as Helena in A Midsummer Night's Dream and Maria in Love's Labour's Lost.

Walter's other film credits include Woody Allen's 2010 romantic comedy You Will Meet a Tall Dark Stranger, The Wedding Video, I Want Candy, Lady Godiva and Remember Me?.

Walter has appeared on a number of programmes on BBC Radio 4, including Seekers, House of the Spirit Levels, Smelling of Roses, No Commitments and All My Life.