"I think I have heard people say that in ever decade I have lived in London and of course there is some truth. But it is also true that the homicide rate in London has halved in the last 20 years (https://en.wikipedia.org/wiki/Crime_in_London)."
There are facts and there are wikipedia links that have no reality to them.
For heavens sake just look at the lawlessness happening in this city right now, thefts are out of control, the police are useless and do nothing, just look at hit and runs - no attendance, look at vehicle theft, no action, soon it will be down to the individual to deal with.
But the Mayor quit his job in Lewisham to become an MP, Boris, I believe was an MP and became Mayor. I am not making political statements or backing any party, my comments are observations from what I see and it's not far off when leaving London to live somewhere else becomes more and more attractive.
With Khan as Mayor, London has gone to the dogs, what used to be a fantastic city has become a lawless and expensive place to live.