text: I know that the current UK head of state (and once suggested "Defender of All Faiths") had a nice chat with the Pope last week, but I don't thing that Westminster Cathedral (a catholic cathedral) counts! St Paul's however, I'll grant you :)
  Whether a "place=city" in OSM should match "what a place calls itself" or "has a cathedral" or "places that a legally cities in the local country" or "the largest settlement or settlements within a territory" has been discussed on and off for years.
  The OSM wiki suggests the last of these, which might invalidate St David's and might include Reading, but current OSM tagging in IE and UK favours legal status: https://overpass-turbo.eu/s/2ejy .
  This note follows a comment on https://www.openstreetmap.org/changeset/36574595 and was intended to see if that change had broad support among people who actually live in Westminster.
  It hasn't been changed back (or provoked further discussion elsewhere) since 2016 so I'll close this note.