On the prospect of a sixth run, Spearritt told TV Choice: "There's been no mention of it to me. It's a difficult one. We've had five series and it would be lovely if it did carry on. [But] it's kind of tough though because I hope it hasn't lost momentum.
"If we made another one, by the time it's shown again, all the fans will have been waiting a couple of years and I don't know if that's entirely fair."