Windsor plays Rose, a high-flying university student who is accused of cheating in her dissertation by her professor, Leah (Katherine Kelly – The Night Manager, Strike Back).

The women’s relationship spirals out of control as what should be a fairly open-and-shut case of academic deception, gets blown up into a devastating series of events with fatal consequences.

The series is produced by Fleabag producer Lydia Hampson, who spoke to the RTS about the project last year. “They [Leah and Rose] are both very intelligent and they both have their own moral code. Neither will back down, even though this whole situation could be avoided if they were both like ‘life’s too short…’

“But they won’t let go and they become obsessed with each other. Rose prises her way into Leah’s life – into other elements of her world beyond the academic. She manages to embroil herself in Leah’s life personally and she becomes like a cuckoo in the nest.”

The four-parter comes from Gaby Hull, whose previous credits include Benidorm.

“He’s another comedy-now-doing-drama boy,” Hampson explained, drawing a link between Hull and her work with Phoebe Waller-Bridge and the multi award-winning Fleabag.

Tom Goodman-Hill (Humans) also joins the cast as Leah’s university professor boyfriend, and Lorraine Ashbourne (Unforgotten) and Peter Firth (Spooks) play her parents Angela and Michael. Adrian Edmondson (Bancroft) plays Rose’s father, William.

Filming begins in June 2018 and the programme will hit screens in 2019.