Continuing with my Welsh game.
By the death of my second character, King Harri "the Enlightened" of Wales, after 36 years of rule in September of 947 the political situation in the Isles has shifted drastically. The Northmen, which included some Flanders-settled Vikings, pushed in various wars to increase their holdings. At one point holding most of Ireland, half of Scotland, and looking to push further south into England. They managed to re-conquer Lancaster and seize parts of Essex. Wales was spared any direct challenge and mostly had to deal with raids.
Internal strife and alliance breakdowns seem to have done the various Viking kingdoms in. The Isle of Mann gained independence, allowing it to be conquered by Wales. The High Chiefdom of Moray took back many holdings in the north and south-east of Scotland, as well as conquering much of northern Ireland. The rest of the Irish rebelled against their Viking lords, driving them out of Ireland. Wars against England sapped the Anglo-Viking kingdoms of manpower and broke them. England re-conquered much of what it lost and even took parts of Flanders.
Wale conquered much of the weakened holding in Lancaster towards the end of King Harri's reign, leaving four single-county Viking kingdoms left on the Isles.