The change from footway to corridor has resulted in them not displaying on the standard map. Looks a bit wrong with the roof top service roads showing but not the walkways inside
They show correctly on https://map.atownsend.org.uk/maps/map/map.html#21/52.91956/-1.47383 but not https://www.openstreetmap.org/#map=19/52.919438/-1.472782