Hi AR_FKU,
I'm unsure why it was necessary to completely delete Walthamstow Fire Station, then re-draw it in an offset position. Not only has the address data not been copied to the new way, looking at the Mapbox Satellite background here - which is near vertical unlike the angled Bing Aerial - shows the footprint of the building seems to be closer to how it was mapped originally.

https://overpass-api.de/achavi/?changeset=161774799