Search london history from Roman times to modern day
A bit out of date, but this interactive map of step free London is very good
All the London railway stations :
This is my basic introduction to the Jubilee line.
The Junbilee line runs between Stanmore and Stratford. It is generally very accessible with some major excep[tions, and visits some of the big terminus stations in London, plus Westminster.
A note about Westminster station, which is highly accessible, but also has some entrances which are NOT. Make sure you only enter it via the main entrance.
It is a very busy line, but I use it a fair amount, and also has Green Park which is a major hub for getting about for me.