Snickets and ginnells where I'm from (near Cleckheaton). But both were passageways rather than lanes...ginnell with a hard "g" and roofed or covered, snicket not.

They were both narrow....you could invariably touch both walls (of both types) with your arms outstretched (even as children). Many of the twittens I've encountered down here since moving to the Kent - Sussex borders are too wide to be called either ginnells or snickets where I'm from....they'd just be lanes, back alleys or "dubbel raws" (narrow back or side lane between two rows of houses).