So I read through this at a steady pace these last months and I must say I am most impressed by the detail of this timeline. I hope for an update some time in the future.
Anyway, I'm kind of wondering about the situation of the British/Commonwealth colonies, especially in Africa. I'm thinking that the Commonwealth will have a real hard time to keep them functioning enough. The chaos of disturbed trade patterns will seriously damage the situation in the large port cities that were dependent on foreign trade. These cities also serve as a perfect place for ideological awakening and political organizing.
Unless the Commonwealth or the USA takes up the trade by exporting cheap manufactured goods for raw material I think one will see a break in the colonial demographic trends.