With a POD after New Years Day 1900, have Britain be the world's most powerful country by 2015. The Royal Navy must be the world's largest and have more aircraft carriers than the rest of the world combined. The RAF must also be the world's largest. The naval bases at Esquimalt, Simonstown, Singapore must still be in operation by the Royal Navy. Britain must also have the world's largest nuclear stockpile and the world's most advanced space program. Lastly, Britain should also have the world's largest merchant marine. You also have to maintain the connection between Britain and the Dominions.