You are right that OS data can have mistakes, and should not automatically override what's in OSM now. To resolve a difference (whether of apostrophes or anything else) you need to use independent sources such as postal addresses, local knowledge or histories of the area.
Rather than adding a note tag for every such case, I usually explain the sources used in the comment to the changelog (so that viewing the object's history will show it). In a particularly complicated case I would add a note tag. -- Ed Avis <[email protected]> _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
