Question: What role did this English actor play in "The Chronicles of Narnia" films who also appeared in the  West End stage production of Birdsong?
Context: Christopher Naylor is a British actor.  He has appeared on TV in "Warriors" (1999), "Bugs" (1999), "Sweet Revenge" (2001), "In Love with Barbara" (2008) and onstage in a 2007 regional tour of "Hay Fever".  He currently stars in the West End stage production of "The Woman in Black" at the Fortune Theatre. Paul Keating (born in 1976) is an English actor.  He has been nominated twice for an Olivier Award for his performances on the West End stage.  He began acting at the age of 12, appearing as Gavroche in Les Misérables at The Palace Theatre for 10 months. Flight from Folly is a 1945 British musical comedy film directed and produced by Herbert Mason, in his last directorial credit before moving onto production, for Warner Bros.  It stars Pat Kirkwood and Hugh Sinclair, with music from Edmundo Ros and the Rumba Band.  Kirkwood had appeared in minor roles in four films between 1938 and 1940 before focussing her career on the West End stage, where she had become a major star during the war years.  "Flight from Folly" was designed to give Kirkwood her first starring screen role, with the hope of breaking her out as a big-name film attraction. While Parents Sleep is a 1935 British comedy film directed by Adrian Brunel and starring Jean Gillie, Enid Stamp Taylor and Romilly Lunge.  The film is a screen adaptation of a 1933 play by Anthony Kimmins, which had been a popular success on the West End stage in the West End of London. Joseph Tremain (born 11 October 1991 in Romford, Havering) is an English actor.  He has appeared on radio and in theatre, TV and films.  He has also appeared in a number of commercials for a variety of products.  Tremain made his West End stage début in a production of "The Full Monty" at the age of 10.  He is best known for starring in the first series (13 episodes) of the children's television series "Morris 2274" in 2003 for Five television.  He has also appeared in an episode of Half Moon Investigations for the BBC.  He attended the Sylvia Young Theatre School in London. Frederick Volpe (31 July 1865 – 7 March 1932), sometimes printed Volpé, was an English actor.  He made his stage debut in his early twenties.  From 1894 until his death he was a familiar figure on the West End stage, generally in undemanding comedies and other ephemeral productions.  Among others, he created the role of Alexis in "The Girl in the Taxi" (1913).  He made several films, beginning in 1917. Joseph Roger Brown, MBE (born 13 May 1941) is an English entertainer.  He has worked as a rock and roll singer and guitarist for more than five decades.  He was a stage and television performer in the late 1950s and a UK recording star in the early 1960s.  He has made six films, presented specialist radio series for BBC Radio 2, appeared on the West End stage alongside Dame Anna Neagle and has written an autobiography.  In recent years he has again concentrated on recording and performing music, playing two tours of around 100 shows every year and releasing an album almost every year. Billy Boyle is an Irish actor on British film, television and stage.  He is a veteran of the West End stage having played leading roles in over 15 hit shows.  In his first West End musical "Maggie May" he was nominated as best newcomer.  Gower Champion then chose him to play Barnaby in "Hello Dolly" at The Theatre Royal Drury Lane.  He appeared in "Canterbury Tales" at the Phoenix Theatre as The Clerk of Oxford.  Harold Hobson, The Times critic said, "He was a breath of fresh air in the West-End".  He then went on to play leading roles in "No Sex Please, We're British", "Billy", "What's a Nice Country", "The Rivals", "Love, Lust, & Marriage", "Some Like it Hot", Disney's "Beauty and the Beast", and in the original cast of "Dirty Dancing.  Lately he has appeared as Grandpa George" and Grandpa Joe in Charlie and The Chocolate Factory at Drury Lane.  In 2016 he was Major Bouvier and Norman Vincent Peale in the smash hit Grey Gardens.  He followed this playing Arvide in Guys and Dolls at the Phoenix Theatre in the West End.He has had his own very successful television series in Ireland "It's Billy Boyle" as well as leading roles in "Trail of Guilt", the award-winning "The Grass Arena", "The Bretts", as well as many guest appearances in EastEnders, The Professionals, Coronation Street, Father Ted etc.  In the late 1970s, Boyle was cast as 'Ronald McDonald' in the European TV commercials and in all print media for the fast food chain McDonald's.  He was the last 'straight man' to Basil Brush on BBC1's "The Basil Brush Show" and later presented a programme, Dance Crazy for ITV, on the history of dance with Lesley Judd.  Lately he has been seen in Dirk Gently, for BBC Four and Lead Balloon.  His many films include Stanley Kubrick's "Barry Lyndon", "Groupie Girl", "Side by Side", "Shergar", "Wild Geese II", "The Scarlet and the Black", "Round Ireland with a Fridge" and A United Kingdom. Benjamin Thomas Barnes (born 20 August 1981) is an English actor.  He is known for his portrayal of Caspian X in "The Chronicles of Narnia" films "" and "", for playing the title character in the 2009 adaptation of "Dorian Gray", for his supporting roles in the films "The Words" and "The Big Wedding", and for his portrayal of American Founding Father Samuel Adams in the 2015 miniseries "Sons of Liberty". Birdsong was a 2010 adaptation of the novel of the same title by Sebastian Faulks.  The text was written by Rachel Wagstaff and the premiere production directed by Trevor Nunn.  That production began previews at the Comedy Theatre in London on September 18, 2010, and opened on September 28, 2010.  The West End stage production's cast included Ben Barnes as Stephen Wraysford, Genevieve O'Reilly as Isabelle, Nicholas Farrell as René Azaire, Iain Mitchell as Bérard, Lee Ross as Jack Firebrace and Zoe Waites as Jeanne.  Other cast members included Owain Arthur, Billy Carter, Florence Hall, Paul Hawkyard, Gregg Lowe, Joe Coen, Jack Hawkins, James Staddon and Annabel Topham.  The play closed on January 15, 2011.
Answer: Caspian X