BRITISH ISLES ALTERNATE HISTORY
This alternate timeline is all about Britain after the romans withdrew, except that unlike OTL, the romano-celts of this timeline put up a stronger resistance to the Saxons, and now Britain is bitterly divided between powerful celtic kingdoms and the new kingdoms of the Angles and Saxons!
Welcome to the BRITISH KINGDOMS!
The nations of the British isles in 600 AD are:
-Irish/Scots Kingdoms (Ulster, Munster, Connacht, Meath, Leinster, Dal Riada, Ui Laighn (the latter two are Irish/Scots colonies))
A detailed timeline of the British Isles can be found here.