WITNESS FOR THE PROSECUTION Welcomes New Cast

Agatha Christie’s WITNESS FOR THE PROSECUTION is welcoming a fresh company at London County Hall, with screen favourite Owen Warner set to make his stage debut as Leonard Vole in the long-running courtroom thriller. The new cast begins performances from 17 March 2026, bringing another high-profile refresh to one of London’s most distinctive immersive theatre experiences.

Warner’s casting is likely to draw particular interest from audiences who know him from television rather than the stage. He is best known for playing Romeo Nightingale in Channel 4’s HOLLYOAKS, a role that helped establish him as a familiar face with younger viewers, and he also reached the final of I’M A CELEBRITY… GET ME OUT OF HERE! in 2022. That combination of soap recognition and reality television visibility makes this a notable theatrical step, and one that places him at the centre of a production built around tension, testimony and the shifting question of whether its accused man can really be believed.

In Christie’s classic legal drama, Leonard Vole stands accused of murder, and much of the play’s suspense comes from the battle to uncover whether he is an innocent man trapped by circumstance or a far more dangerous figure than he first appears. It is a role that requires charm, uncertainty and emotional control, especially in a version of the show where the audience is seated inside a working courtroom environment. Warner’s debut therefore comes with both opportunity and scrutiny, as he steps into a production that depends heavily on performance detail and the careful handling of dramatic ambiguity. This is not just another cast change, but a high-visibility entrance into live theatre inside one of London’s most atmospheric venues.

Joining Warner in the new company is Eleanor Sutton as Romaine Vole, the enigmatic wife whose testimony becomes one of the play’s most explosive elements. Simon Cotton will take on the role of Sir Wilfrid Robarts, the veteran barrister charged with defending Leonard, while Matthew White plays solicitor Mr Mayhew. The wider principal company also includes Michael Mears as Mr Myers and David Whitworth as Mr Justice Wainwright. Supporting cast members announced for the new company are Joe Anthony, Kai Antoine, Andrew Bloomer, Martin Edwards, Oliver Hatfield, Tamsin Heatley, Matthew Hebden, Mark Huckett, Ruchi Rai, Vanessa Sampson, Paul Westwood and Meimei Young.

The production itself has become one of London’s most reliable and unusual theatrical fixtures. WITNESS FOR THE PROSECUTION has been running at London County Hall since 2017, and the venue remains central to the appeal of the show. Rather than presenting the play in a traditional theatre auditorium, the production places audiences inside the council chamber space, which is transformed into a courtroom for the duration of the performance. That site-specific setting gives Christie’s drama a heightened sense of realism, with spectators positioned not simply as passive viewers, but as if they are members of the public attending a live trial. It is one of the reasons the production has managed to sustain interest across multiple cast changes and extended booking periods.

The immersive design has long been one of the production’s strongest assets. In a theatrical landscape crowded with revivals, jukebox musicals and star-driven transfers, WITNESS FOR THE PROSECUTION has carved out its own lane by offering audiences a chance to experience a celebrated Christie text in an environment that feels unusually immediate. The case unfolds around them, testimony lands with added force, and the architecture of County Hall does much of the work in creating a sense of legal ceremony and unease. That physical relationship between audience and action has helped distinguish the show from more conventional Agatha Christie presentations, giving it a clear identity beyond the strength of the source material alone.

The creative team behind the production remains in place, helping maintain continuity as the company evolves. The show is directed by Lucy Bailey, whose work has shaped the production’s balance of period atmosphere, courtroom precision and dramatic escalation. Design is by William Dudley, lighting is by Chris Davey, sound design is by Mic Pool, and casting is by Ellie Collyer–Bristow. Together, that team has sustained the production’s visual and tonal consistency across its many cast iterations, allowing new performers to enter a framework that audiences already recognise and trust.

The arrival of a 15th cast is itself a sign of the production’s durability. Few plays maintain this level of visibility over such a long period without becoming stale or overly dependent on nostalgia. In this case, the revolving cast structure has allowed WITNESS FOR THE PROSECUTION to keep renewing itself while preserving the format that made it successful in the first place. Bringing in Warner, in particular, suggests an ongoing willingness to broaden the show’s appeal by inviting performers with existing fan bases into a proven theatrical machine. It is a strategy that can reinvigorate interest while also introducing new audiences to a venue and production they may not otherwise have considered.

For Warner, the move may prove to be an important career marker. Stage debuts by screen actors can sometimes feel like novelty casting, but in a production as tightly built as WITNESS FOR THE PROSECUTION, the demands are substantial. There is little room to coast on name recognition alone. The courtroom setting places actors under sustained focus, and the drama depends on credibility, timing and the ability to shift audience perception scene by scene. If Warner succeeds, it will not simply be because he has crossed into theatre, but because he has done so in a role central to one of London’s most enduring dramatic experiences.

Audiences have plenty of time to catch the new line-up. The production is currently booking through to 4 October 2026, underscoring the continuing confidence behind the run. With a recognisable new leading man, a fresh cast beginning performances in mid-March, and one of the capital’s most striking theatrical settings still working in its favour, Witness for the Prosecution continues to prove that Christie’s courtroom suspense can hold London in its grip, especially when delivered with this level of atmosphere and theatrical invention.