Saul played the iconic role of Caesar at the Lyric Theatre, Hammersmith in the 2005 Royal Shakespeare Company (RSC) production of Julius Caesar.
In 2006, he took on the dual roles of The Knight and The Merchant in Greg Doran, Jonathan Munby, and Rebecca Gatward's production of The Canterbury Tales, which premiered at Stratford, toured, and concluded at The Gielgud Theatre in London.
The year 2007 was marked by a series of notable performances, including Brabantio in Raz Shaw's production of Othello at The Salisbury Playhouse, Danforth in Patrick Mason's production of The Crucible at The Abbey in Dublin, and Corin in Sam West's production of As You Like It at The Crucible in Sheffield.
In 2008, Saul appeared at the Devonshire Park Theatre, playing Alfred in a new fourhander, Killing Faith, directed by Tony Milner, which kicked off the new Eastbourne Season. He also took on the roles of Polonius and the First Gravedigger in The Stafford Shakespeare Festival production of Hamlet, directed by Bill Buckhurst, with Joseph Milson playing Hamlet.
In 2009, he embarked on a national tour, playing the role of Arthur Birling in An Inspector Calls.
Prior to this, Saul had appeared in Jonathan Kent's production of Oedipus at The Royal National Theatre, starring Ralph Fiennes and Alan Howard. This production concluded in January 2009.
In October 2010, Saul returned to the Salisbury Playhouse, this time playing the Headmaster in Jamie Glover's production of John Mortimer's Voyage Round My Father. Other notable theatre work that year included the central role of Mr Lovely in My Balloon Beats Your Astronaut by Kerry Hood and directed by Elly Green at The Tristan Bates Theatre, and On Racing Hill by Anthony Milner at The Brighton Dome, directed by Tony Milner.
