This was an incredible commission for a novelist unused to writing for television to receive and I seized it with both hands.

Julian Morris (New Girl, Felt), James McArdle (The Worricker Trilogy), Joanna Vanderham (One Of Us, The Go Between), Oliver Jackson Cohen (Mr Selfridge, Emerald City), and David Gyasi (Containment, Interstellar) star alongside Redgrave in the two-part drama which tells two love stories, 60 years apart - stories linked by family, and by a painting that holds a secret that echoes down the generations.

Further cast includes Laura Carmichael (Downton Abbey, Marcella), Julian Sands (The Girl With The Dragon Tattoo, The Killing Fields), Angel Coulby (Merlin, The Tunnel), Charlie Wernham (Bad Education, Hollyoaks), Tommy Bastow (Angus Thongs & Perfect Snogging, The Cut), and newcomer James Godden.

The series will be directed by Michael Samuels (Any Human Heart), produced by Lisa Osborne (Little Dorrit) and made by Kudos for BBC One.

Patrick Gale says: “This was an incredible commission for a novelist unused to writing for television to receive and I seized it with both hands. As a writer who has long celebrated and explored alternative sexualities and hidden lives in his fiction, I’d been impatient for the BBC to do something similar for a mainstream audience.

"I was so flattered when they and Kudos came to me that I quite forget to be appropriately daunted by the enormity of the challenge: represent gay men’s experience in the 20th century. I hope I’ve come up with a story that finds the universal resonance in the marginalised. To then see it fleshed out by such a five star cast, including one of my lifelong heroines in Vanessa, is incredible.

"I’ve only watched two days’ shooting and the daily rushes so far, but already I’m getting that fizzy feeling, finding the scenes and characters I’ve been carrying around with me for the last half-decade so lovingly brought to life. Already I can see that the look of the show is going to be incredible. Here’s hoping it starts a national conversation.”

Two love stories, sixty years apart, chart the challenges and huge change to gay lives from the Second World War to the present: In 1944, British Army Captain Michael Berryman (Cohen) meets war artist Thomas March (McArdle) in Southern Italy while chaos reigns all around them. Despite having a young fiancé, Flora (Vanderham), waiting at home for him, straight-laced Michael finds himself falling for Thomas’ bohemian charms. In 2017, an ageing Flora (Redgrave) looks on as her grandson, Adam (Morris), tentatively forms a relationship with his client Steve (Gyasi) in a more accepting world. But while the external obstacles have fallen away, a minefield of internalised issues and dangerous temptations still line the road to happiness.

Diederick Santer, Executive Producer for Kudos, says: “I’m so pleased to be sharing Patrick’s epic yet intimate love story with the BBC One audience, and thrilled to have assembled such an exciting cast.”

Man In An Orange Shirt is a 2x60’ produced by Kudos (Grantchester, Broadchurch, The Tunnel, The Hour, Life on Mars, Spooks) for BBC One. The drama was commissioned by Charlotte Moore, Director, BBC Content, and Ben Stephenson, former Controller of Drama Commissioning. Executive Producers are Diederick Santer for Kudos and Lucy Richer for BBC One. It will be produced by Lisa Osborne (Little Dorrit) and directed by Michael Samuels (Any Human Heart). Filming has begun in and around London.

The series will be distributed by Fremantle. Kudos is part of the Endemol Shine Group.