English actor Jodie Whittaker plays an Australian character, while Australian actor Kat Stewart plays an English character. Each actor ultimately exchanging their natural accents to play their roles, as each other's wives. And Australian actress Noni Hazelhurst uses a thick Scottish accent.
All three of the lead actors have starred in drama series based in women's prisons: Yael Stone appeared in Orange Is the New Black (2013), Nicole da Silva starred in Wentworth (2013), and Jodie Whittaker in the second series of Time (2023)
Hat's house is the same home used for Sally's in The Lost Flowers of Alice Hart. The residence is a period house located in Avalon Beach, Sydney.