No, it was a planned new one. Last I can find on a quick NSC search is a tweet from September ...
nskbha 16h
@NorthStandChat re new big flag. Just waiting a response from potential manufacturer. Will provide an update asap.
Must have been more progress by now, surely ... :???:
So far as I remember there was one due to be purchased with the money left over from the Stand or Fall banner?
Did I spot a large flag being unfurled in the south west corner recently, too?