My mint lives in a pot by my back door, I think that seems to be enough to keep it just about green in parts over winter, but my friend in Driglington near you can't keep her mint alive over winter, so that may be an indoors job or freeze/dry.
My parsley happliy overwinters no clotche open on the allotment, tides us over til the next sewing starts coming thoguh in spring...however for Yorkshire maybe you would need a clotche or a bit of fleece. We barely get a frost here, although it did make it through the (relatively) heavy snows last Feb (more than an inch in Cambridgeshire is heavy
