It is possible to create a Query that identifies eg all Constituents with a particular Constituency Code that needs to have its End Date populated.
But Global Change doesn't allow you to specify which Constituency Code to update, and will merrily stick the same End Date on Every Constituency Code that those Constituents may have.
We need to be able to globally change specific Constituency Codes, as can be done with Attributes.
same issue with solicitor assignments and a few other fields. only other option I'm aware of is to export info, change/update and then import it.