Although largely unperformed today, his best known three act work, The New Morality was performed at the Finborough Theatre, London, in 2005.
The murder of Olive Young and True's later incarceration, and relationship with fellow murderer Richard Prince, in Broadmoor Hospital was the subject of a play, Lullabies of Broadmoor, performed at the Finborough Theatre, close to the site of Olive Young's murder, in 2004.
A play about the events of 12 December 1940 entitled "Operation Crucible" is set to be performed at the Finborough Theatre in December 2013.
It received its British professional premiere at the Finborough Theatre, London, in 2003 with James Hillier in the lead role as August, where it sold out for the entire run.
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Painting A Wall (Finborough Theatre), The hounding of David Olwale (West Yorkshire Playhouse), Three Sisters (Manchester Royal Exchange), The Local Stigmatic (Edinburgh Festival), Les Jeudis (Centre Pompidou,Paris), Twelfth Night, The Lunatic Queen, Taniko, Measure for measure, Le Cid, The Cherry Orchard and Winslow Boy.
Originally produced by and starring Charles Wyndham at the Criterion Theatre, London, in 1907, it was revived in London at the Arts Theatre in 1949, at Liverpool Playhouse in 2006 (although the title was changed to The Lady of Leisure), and at the Finborough Theatre, London, in 2007 and has also been filmed.
His many stage appearances included roles for venues such as the Hampstead Theatre, The Mercury Theatre, Colchester, Pentameters Theatre and the Finborough Theatre.
Also in 2006, Buring played Olivia in a production of Shakespeare's Twelfth Night by Exeter's Northcott Theatre Company, alongside Sara Weymouth and David Gwillim, and appeared in a new play, Seduced, by Michael Kingsbury at London's Finborough Theatre.
Primavera Productions produced the play as part of the 'rediscoveries season 2007' at the Finborough Theatre, directed by Tom Littler.
William also has extensive stage experience, both as an actor and a theatre director, including a notable success in playing the Micheál Mac Liammóir character in Gates of Gold by Frank McGuinness at the Finborough Theatre, London, and in the West End.