I think you're more or less spot on, but very far with the last one on UK.
The economy is more resilient than you think, especially the City. I have a feeling the war ironically helped. It prevented the finance from moving out to the continent.
Sure, but OP said “continues to decline”, not “completely collapses.”
I’m not sure how that plays out, but hyperinflation can’t be good.
Not sure the UK is there yet, but at some point the situation will no longer be salvageable.