Michael Sheen as Aneurin 'Nye' Bevan

Sharon Small as Jennie Lee

Remy Beasley as Gwen Davies

Jon Furlong as Herbert Morrison/Mr Howells

Roger Evans as Archie Lush

Oliver Llewellyn Jenkins as Ensemble and Swing

Rhodri Meilir as David Bevan/Councillor Hopkins

Tony Jayawardena as Dr Dain/Winston Churchill

Kezrena James as Nurse Ellie/Arianwen Bevan

Dyfan Dwyfor as Speaker/Luke Williams

Matthew Bulgo as Mr Orchard/Mr Francis

Ross Foley as Clerk/Ross Doherty

Daniel Hawksford as Neil Jones

Beau Holland as Mrs Jones/the Cleaner

Stephanie Jacob as Clement Attlee/Matron

Michael Keane as Owen Thomas/Councillor Morgan

Nicholas Khan as Neville Chamberlain/Dr Frankle

Rebecca Killick as Lucy Pritchard

Mark Matthews as Mark Smith/Mr Leslie/Graham the Porter

Ashley Mejr as William Jones/Mr Llywellyn/Chris the Porter

Lee Mengo as Jack Stockton

David Montieth as Mr Fury

Sara Otung as Sara Roberts/Mrs Lewis

Mali O'Donnell as Ensemble and Swing