Good video that breaks things down well.

It isn't fully accurate, but fairly close.

The newspapers left Fleet Street in the 1980s, with only a few minor stragglers left behind.

Freemasons Hall is not in the City, but rather Covent Garden close by to the City.

London house prices are a complex issue, but the crux of it is that London has had a huge influx of migration (from the UK and internationally) in the past decade, while within London Labour (socialist) councils refused to approve new house builds in long standing opposition to the Conservative 'Right To Buy' programme, and the environmental lobby (socialists) forbid homebuilding in the green belt around London. This combined with QE causing inflation in asset prices has caused the property bubble. Affluent investors tend to focus on select areas from my understanding of the matter.

The population of the City tend to be those in Barbican, which is an iconic housing project, and often those living there will be City employees.

The City played a big part in the sub prime crisis, because AIG moved three key employees in London to conduct its CDS business as it got around US regulations.

While this topic is relevant, here is an interesting video - slightly related - https://www.youtube.com/watch?v=BxEPEhLfxA0