Katherine told The Sun's TV Magazine: "Unfortunately there's a really boring logistical problem. There's such a tight window between when Corrie film the episodes and when they broadcast them - and I'm shooting Mr Selfridge from now until November.
"So even though I've always said I'd love to pop back, I don't think that will be a possibility. Isn't that sad? It's a shame, because Becky would definitely have come back."
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