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So, bear with me.
There was a fantastic timeline/After Action Report written a long time ago called Rome AARisen.
Now at the end it put forward a successor state to the main character (the Byzantines, shocker, I know) based in Scotland, effectively through inheritance.
Back to OTL, historically the Palaiologoi had a family member ruling in Montferrat - I'm curious as to whether you could have something similar happen in Scotland, and what impact that could have? Could we see a banishment scenario? Some random Scots defending Constantinople? A potential Scotland as the heart of the renaissance because of an influx of Greeks?
I'm curious as to whether a trip to Caledonia could have some interesting historical effects.