@Crikeyalmighty - the reason for that response by City people is that Johnson didn't serve their interests. It is not in the financial interests of the UK or the City to look corrupt explicitly or engage in fraud. People like putting their money and assets here because of the stability and respect of the law.
If that appears unstable then the UK will not get the investment or money from outside. We need to look credible.
The idiots who supported Johnson are people who have never had to be credible to others. Instead, they liked his cowboy style - but money and investors do not like that.
Johnson had a good go at ruining the Tory Party and drove out a lot of people who he decided were not loyal. If you run a political party in England like Stalin then you will make a lot of enemies if you don't deliver.
So the guy is friendless and back with the weirdo contingent, Dorries, Mogg, Patel, Bone, Duncan Smith etc. People who are weird even in the Conservative. The loser crowd