so the London Borough of Sarf Essex..You know shouldn’t Greater London be far larger than in OTL due to it being the Center of the dominant superpower for over two centuries, therefore having its economic power funnelled through it.
London in this TL the gateway to the colonies from the rest of UK and Mainland Europe, I.e. stay a few months to earn passage to the colonies (but maybe put down more permanent roots).
I can easily Greater London expanding to the coast in order to handle all the extra temporary migrants and increased industrial output compared to OTL, being the most populous city in the Empire until WW2, where New York would have overtaken it (According to previous post as the most populous city in the Empire).
Really compared OTL Greater London should be massive and probably have hit the 10 million mark before the turn of century.