The best SF book ever written is Earth Abides by George R Stewart. It's still available on Amazon.
A plague kills most of the world. But it's not the usual end of the world story, where the survivors all get guns and shoot each other. It's a more gentle story of a group of survivors and how they manage as first the electricity, then the water, cut off. Through the years there are births and deaths. The hero, Ish, tries to teach the children to read, but all they want to do is play. As the years go on, he realises that they can't survive by scavenging from food shops forever. He makes a bow and arrow, and makes a game of shooting with the children. The day a boy comes home with a rabbit, he realises his tribe will survive. The story covers many years until Ish is an old man.
I first read this wonderful book 50 years ago. My copy was read so many times it fell apart, and I bought a new copy. I still read it once a year.
Gary Glitter programme Tuesday
To think that London, or anywhere else for that matter, does not belong to any one demographic