Firstly I would have aluminium frames built above the open air portion of the metro rail with scaffolding that houses solar panels, I would get investors to pay for it and give them handsome returns to encourage them to invest a lot more. The space above the trains would become an asset to London transport because it sells electricity back to the national grid.
Then I would introduce the 'small talk code', I would announce that if you wear a cap or t-shirt with red and green stripes, it means you're up for small talk. Perhaps people could have key words on their t-shirts for an ice breaker, like sports and computer games. London lacks small talk yet it is essential for mental health. I would have canvas printed signs attached to lamp posts to show everyone the ' small talk code'.
I have many ideas that I think would be useful, boat rides to Southend for the tourists if they want to visit the coast and things like that.
The problem is I have no prestige or status in society so my ideas will stay in my head. Never mind. Perhaps someone with a high status will read this post one day.
That is the problem with society, you need a high status or prestige before anyone will listen to you. You could have a solution to a big problem and it would stay with you till you die.