How did London and Britain change after World War II? and how quickly?

[.^.]

how London, specifically was like at the turn of the century? and how it changed up to the WWI and WWII and how it changed AFTER WWII?

and what were reasons? how was funded , etc?

how also the PEOPLE'S ATTITUDES changed from before the war and after? and what led to this and why?

please explain how this was similar or not in USA or elsewhere in Europe and why different?

thanks for your answers!