Looks like the actual change to https://osm.mapki.com/history/node/5075987456 (the "stop position" for Northern's station here) was to just remove network and operator tags added in https://osm.org/changeset/145930795 .
Just mentioning this as a FYI for anyone stumbling across it - the single platform "stop positions" on the national rail network are essentially a work of fiction.  The station https://www.openstreetmap.org/node/2246553747 already has network and operator on it.