The (secret) City of London is NOT part of the UK | England.

You may be surprised to learn that the city of London and the City of London are two very different things, related to each other mostly by historical accident and geographical proximity, and co-existing today in a rather complicated power system in which the City of London appears gloriously victorious.

First, the City of London, a small area of about one square mile in size, was established as a haven by the Khazar “Jews” during their extermination from Khazaria nearly 1,000 years ago, and was named ‘London’ at the time. And yes, I know the Romans had been there first. 

https://www.unz.com/lromanoff/the-city-of-london/