Design
I found the design on your blog to be a bit confusing in some of the choices made. You seem to have the ENTIRE blog post shown to the user on the front page instead of a snipped. This means that if they want to look at older posts they have to scroll, scroll some more, then a bit more, and then they might get to find something they want (remembering that you want to make it as easy as possible for users to find new content on your site!)
Your actual HOME page (
https://www.richestmaninlondon.com/home) Just gives me your twitter feed sort of boxed in on the right
There' an awful lot of white space on your pages so I would either make the blog post content fill up the page more width wise and reduce the sidebar size or think about adding some colour to the background.
I would get rid of the disclaimer page. Just have the content a bit more condensed and have it on the side of your blog as a widget so it appears on every page.
Content
The Monday Music Monday concept is very clever! I think the content just needs a bit more of a WOW factor but you are getting in the hunt as they say in regards to that section of your site I feel.
You interlink VERY well in your blog. I can go to one of your pages and more often than not there is links within that content to other pages on your site.
The side hustle summaries are also a bit dry. I'm never overly convinced on those things anyway as I'm not sure anyone beyond the person writing them cares that they earned 60p via the JobSpotter app that month. The content also becomes old and irrelevant VERY quickly. If you decide to keep them I would recommend putting links in it so people can at least read it and then click straight through to download the app or visit the website you are earning money from.
Download and use
Grammarly when you are writing posts as you've got sections like this I found
It's missing capital letters and other punctuation and Google does actually care about these things (and so will your readers!)
Thoughts for the future
You need to work on your front page a LOT. Ignoring the fact it has ENTIRE blog posts on there instead of snipped if I go to your blog I have no real clue what it's about. The header image for starters need to be more descriptive I feel about what you can actually get from the site.
Floating social media SHARE icons are annoying. Think of another way to implement those. My suggestion would be in static form at the top of each page.
Your Essential Reading page (
https://www.richestmaninlondon.com/recommendations/essential-reading) is another good idea but you need a LOT more content if you want people to click through and buy those books. They either need reviews by yourself next to them or other reasons why people should spend money on it. Affiliate marketing is all about making the reader feel they NEED the thing you are recommending, just putting the link in front of them isn't enough.