musical director

Gregory Batsleer

The first choral conductor to be awarded the Arts Foundation Fellowship, Gregory is widely regarded as one of the most in-demand and innovative musicians of his generation. From 2013-17 he was Artistic Director of the National Portrait Gallery’s Choir in Residence Programme, overseeing the first full time in-house gallery music programme in the world.  


Current conducting posts include Chorus Director for the Scottish Chamber Orchestra Chorus and the Royal Scottish National Orchestra Chorus, and Director with Huddersfield Choral Society.  As a guest conductor engagements include the Halle, RSNO, Black Dyke Band, the Academy of Ancient Music, NYCGB, Toronto Mendelssohn Choir, Royal Northern Sinfonia and Aurora.


Gregory is a committed collaborator outside the classical sphere.  Highlights include projects with Carlos Acosta, Damon Albarn, Elbow and the Sam Wanamaker Theatre.  He has curated several successful performances at Latitude Festival and has worked closely with the composers Joe Duddell and David Lang, the latter on the RPS Award-winning 'Memorial Ground’


company manager

Oskar McCarthy

Oskar is a singer, actor-musician and producer based in London. As a performer, he collaborates with many of the UK's leading choirs and touring opera companies in stage, concert and session work. As a solo artist, he is interested in experimenting with different ways of presenting recital work, expanding established practices as a vocal actor and physical performer.


His work as a producer draws on this experience as a performer. He has made work for A Curious Invitation at the Waterloo Vaults and Latitude Festival, for Pop-up Opera at Wilderness, Holt and Grimeborn festivals, and as Senior Arts and Culture Programmer for Nozstock Festival he programmes a range of speakers, workshops and spoken word as a complement to traditional theatre, circus and dance acts across the site each year. The fire and fireworks show he coordinated won the 'Mind Blowing Spectacle' award at the Association of Independent Festivals Awards 2017.

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associate producer

Louis Hartshorn

Louis is an Olivier Award-winning live entertainment producer. He is Executive Director of the Arts Theatre in the West End and Managing Director of Hartshorn - Hook Productions.


Work includes a 400th anniversary production of Richard II in the Palace of Westminster, the Olivier Award-winning Rotterdam (Arts Theatre, 59E59 Off-Broadway), Urinetown (Apollo), American Idiot (Arts, UK Tour), Woody Sez (Arts; nominated Best Musical, Evening Standard Awards 2011), Away From Home (New Zealand, UK Tour), The Rat Pack (UK and international tour).


Louis is a founder of Future Stages, a not-for-profit organisation providing access to the performing arts for young people and is a director of the Hartshorn - Hook Foundation.