crossing=uncontrolled itself should abandoned. Zebra Crossings etc in UK are “controlled” crossings. “Uncontrolled” refers to those without traffic control, ie priority control, or signal control.
To make matters worse, “informal” in UK official terminology is synonymous with “uncontrolled”. It doesn’t refer to logical crossing location formed naturally at intersections between street corners, but can include islands and dropped kerbs, if not also crossing:markings=surface non-statutory.