Your challenge is to come up with an AH scenario in which all of the 'Celtic Nations' (Ireland, Scotland, Brittany, Wales, Cornwall and the Isle of Man) are united under a single pan-Celtic government by the present day. This Celtic Nation must also exclude England (or the majority thereof); and you get bonus points if you can pull this off with a POD later than 1838, after the first meeting of the Celtic Congress had taken place in Abergavenny. Up for it?