A lone steeple rises out of Helmshore town. It looks down, silent, at the rows of brick houses nestled against the grey-green Lancashire hills. Pendle, famed for its historic witch trials, is just up the road; Edenfield just down it. In one of those streets with their neat little night lights is a large, well-kept house. It’s big and roomy, but it’s not vast and posh. It has cream-white walls, soft lighting and old exposed staircases and banisters. There are a couple of pictures on the walls, just enough to make it homey, but sparse enough to show that the occupant, Sadie Hartley, is busy. She’s a loving, working mum who’s made it her business to provide for her family, after all. A bonny lady with laughter lines, she’d have…