With a PoD following the British defeat in the American Revolutionary war achieve the following situation by 2011:
The British Empire is a reasonably centralized Federal State ( about as much as the OTL USA ) consisting of atleast: Great Britain & Ireland, Canada, Australia, New Zealand, and South Africa, Rhodesia, Hong Kong, Singapore, Malta, the British west Indies, and all of the UK's OTL overseas colonies. ( perhaps Zanzibar and Argentina if it's seized too )
Bonus for an extended Commonwealth with ex colonial dominion states closely allied with the British Empire. ( especially if you include a united India within this )
The British Empire is a reasonably centralized Federal State ( about as much as the OTL USA ) consisting of atleast: Great Britain & Ireland, Canada, Australia, New Zealand, and South Africa, Rhodesia, Hong Kong, Singapore, Malta, the British west Indies, and all of the UK's OTL overseas colonies. ( perhaps Zanzibar and Argentina if it's seized too )
Bonus for an extended Commonwealth with ex colonial dominion states closely allied with the British Empire. ( especially if you include a united India within this )