:Quick response. I think the difference in interpretation hangs on whether there was an unambiguous offer to end partition from London to Dublin, over the head of Craig, in return for joining the Allies, or an offer to discuss the matter. Churchill in particular had always been adamant that 'Ulster' would not be coerced into a union with the south against its wishes. Perhaps he did momentarily reverse this policy position, but the reaction of the Dublin government indicates that they at least did not consider this was the case, nor do Churchill's own memoirs support this line of thinking. I'll review the sources again when I get a chance. Best.