In Portugal's case, the interior would have been ok, apart from the cooling of the weather post-fall, that would make it temporarily more northern-European in temperatures, but that could be semi-remedied, by adapting to the temporarily changed weather and moving to the coast to rebuild things...
Nice concept. :)
A small nitpick, Extremadura is too large a geographical area to be a simple Dukedom in Portuguese tradition. I suggest something more like Prince/Princess of Estremadura (Príncipe/Princesa da Estremadura).
Are there investigations by TTL British Government to find the sources?
If this is found, internationally it would be a casus belli.
And there would probably occur a lot of arrests and confiscations in Ireland.
From a stategic point of view, they only need to hit Russia and Drakia to achieve their goals, Russia's allies are either militarily weak or Russia's unwilling partners.
The world is getting ready for new wars, while the anthropocene extinction made it to became a mix of 1980's post apocalyptic fiction and the movie AI.
Good to see TTL Portugal become free again.
Sorry to hear that. :( Hope you reconsider, but wish you good luck in your projects.
Happy new year...