A series director for the hit BBC show Peaky Blinders has said a film adaptation is being written by Steve Knight.

Otto Bathurst, who helmed the first three episodes of the series starring Cillian Murphy, provided something of an update after years of rumours about a movie version.

“I think it’s actually being written,” Bathurst, who won a Bafta for his work on the Birmingham-set gangster drama, told Yahoo Movies UK. “I think Steve, Steve Knight the writer, I think they’re planning something, yeah.”

Last year Knight said they were “probably going to do it”, although nothing official has been announced.

Murphy was asked about the prospect of doing a film back in 2016 and appeared ambivalent about the idea, commenting: “I’m sort of like, ‘Eh, yeah, I don’t know, I’m not sure’.”

“I love the idea theoretically,” he said, “but it has to come at the right time, you know? You can’t alienate the beautiful democratic thing of television where everyone just watches it.”

He added: “It’s kind of a sexy idea, but I’ll reserve judgement until the idea is presented to me.”

Peaky Blinders series 3 in pictures Show all 30 1 /30 Peaky Blinders series 3 in pictures Peaky Blinders series 3 in pictures Cillian Murphy as Peaky Blinders mob boss Tommy Shelby BBC Peaky Blinders series 3 in pictures Peaky Blinders is acclaimed for its stunning cinematography Peaky Blinders series 3 in pictures Annabelle Wallis as Tommy's new wife Grace Shelby Peaky Blinders series 3 in pictures Helen McCrory as the fearsome yet complicated Aunt Polly Peaky Blinders series 3 in pictures The Peaky Blinders, always meaning business Peaky Blinders series 3 in pictures Tommy Shelby dances with his new wife Grace in the series three premiere Peaky Blinders series 3 in pictures Cillian Murphy as Tommy Shelby and his young son Peaky Blinders series 3 in pictures Cillian Murphy looking dapper as Tommy Shelby at his wedding to Grace Burgess Peaky Blinders series 3 in pictures Tommy's bride was finally revealed in episode one of series three Peaky Blinders series 3 in pictures Helen McCrory returns as Aunt Polly Gray Peaky Blinders series 3 in pictures Alexander Siddig plays Polly's potential new suitor Ruben Oliver Peaky Blinders series 3 in pictures Oh to own one of these beautiful 1920s cars Peaky Blinders series 3 in pictures Harry Kirton as Finn Shelby Peaky Blinders series 3 in pictures Cillian Murphy as Tommy Shelby meeting Gaite Jansen as Duchess Tatania Petrovna Peaky Blinders series 3 in pictures Tommy Shelby has moved into the higher echelons of society but the corruption continues Peaky Blinders series 3 in pictures Harry Kirton as Finn Shelby Peaky Blinders series 3 in pictures Gaite Jansen as Duchess Tatania Petrovna Peaky Blinders series 3 in pictures Paul Anderson as Arthur Shelby with Cillian Murphy as his younger mob boss brother Tommy Peaky Blinders series 3 in pictures Paul Anderson and Cillian Murphy as Arthur and Tommy Shelby Peaky Blinders series 3 in pictures Tommy struggles to keep Arthur under control in the first episode of Peaky Blinders series three Peaky Blinders series 3 in pictures Ian Peck as Curley and Ned Dennehy as Charlie Strong Peaky Blinders series 3 in pictures Benjamin Zephaniah as Jeremiah Jesus and Jordan Bolger as Isiah Peaky Blinders series 3 in pictures Paul Anderson as Arthur Shelby at Tommy's wedding Peaky Blinders series 3 in pictures Helen McCrory battles with self-loathing as Polly Gray Peaky Blinders series 3 in pictures Richard Brake as intimidating new character Anton Kaledin Peaky Blinders series 3 in pictures Alexander Siddig as the charming Ruben Oliver Peaky Blinders series 3 in pictures Tommy Shelby orders the Peaky Blinders to behave themselves on his wedding day Peaky Blinders series 3 in pictures Tommy Shelby's mind is elsewhere at his wedding breakfast Peaky Blinders series 3 in pictures Jordan Bolger as Isiah at Tommy's wedding Peaky Blinders series 3 in pictures Sophie Rundle as the strong-willed Ada Shelby

Last year he seemed to have warmed to the notion, telling Deadline: “If the writing is as good as it is for the show, then for sure.”