Marking 100 years since the start of the First World War, the six-part series – previously titled The Ark – stars Oona Chaplin (The Hour), Hermione Norris (Spooks), Suranne Jones (Scott And Bailey), Kevin Doyle (Downton Abbey) and Kerry Fox (Shallow Grave).

The official synopsis reads: “In a tented field hospital on the coast of France, a team of doctors, nurses and women volunteers work together to heal the bodies and souls of men wounded in the trenches. The hospital is a frontier: between the battlefield and home front, but also between the old rules, hierarchies, class distinctions and a new way of thinking.”

The photo shows Sister Joan Livesey played by Suranne Jones, Sister Margaret Quayle played by Kerry Fox, Matron Grace Carter played by Hermione Norris, Lieutenant-Colonel Roland Brett played by Kevin Doyle, Kitty Trevelyan played by Oona Chaplin, Captain Thomas Gillan played by Richard Rankin and Captain Miles Hesketh-Thorne played by Alex Wyndham, with Rosalie Berwick played by Marianne Oldham, Flora Marshall played by Alice St Clair and Orderly Corporal Peter Foley played by Jack Gordon.

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