Sally told BBC Breakfast: “I’m so busy with other projects at the moment, I haven’t got time to sit down and come up with stories.
“What I’d hate to do is do a third series and people say it wasn’t as good, so I want time to go away and really come up with stories that I think are going to make a third series.”
Discussing the popularity of the gritty show, Sally praised Sarah for her role as the determined officer.
“I thought Sarah was just amazing, absolutely amazing,” she said.
The first series won best drama at the television Bafta awards and fans on Twitter were quickly demanding Sarah win a Bafta for her role as the gripping series came to the close.
The BBC One drama, starring Sarah Lancashire and James Norton, drew an impressive overnight average of 7.4 million viewers for Tuesday’s tense series finale as Sergeant Catherine Cawood closed in on the killer Pc and saved the life of an overdosing suspect while arresting her.