London: Beatles & Genesis roads

In a week or so, I am going to travel to London with my family. I used to love travelling, but not so much these days. But, London, I’ve never been to. I just have to go.

Now, my mission is to go to places that have some historical stories related to the Beatles and Genesis. These are my two favourite bands! (The other one is Rush.) I want to find artifacts related to them while I am in London. Can somebody suggest for places to go / visit?